7 Critical Questions Procurement Managers Must Ask (With RFP Clauses, Scorecards, and Swiss-Specific Pitfalls)

Meta description : Switzerland procurement guide 2025: 7 questions to vet bespoke custom LED suppliers – compliance, BIM/3D, metrics, controls, logistics, and TCO.

How to use this guide

Use it like a vendor filter. Start with Question 1 and don’t move on until a supplier shows evidence. If they pass all seven, you’re not just buying fixtures – you’re buying project certainty.

What you’ll get:

• A clear question for each risk area
• Green flags vs red flags (contrast, so decisions feel obvious)
• Copy-paste RFP clauses you can drop into tender documents
• Evidence checklists that force clarity (files, not promises)
• A Swiss case study, application playbooks, and a scoring matrix you can reuse

Introduction

Lighting projects can make or break your building’s energy, comfort, and aesthetics. In Switzerland, the bar is higher: multilingual teams, quality-focused stakeholders, and strong expectations around efficiency and long-term value. This guide gives you seven sharp questions – and the proof to demand – so your shortlist is solid, not hopeful.

A quick Swiss reality check (3 facts that keep procurement honest)

Before we talk suppliers, align on the stakes:

• Swiss buildings consume roughly 90 TWh, about 40% of Switzerland’s total end energy demand, and around one third of national CO2 emissions.
• Lighting is still a meaningful slice of building energy. U.S. survey data showed lighting at 10% of commercial building site energy in 2012 (down from 21% in 2003). DOE commonly cites lighting as around 15-20% of building electricity use.
• Since 1 September 2021, Switzerland requires the new energy label for light sources, which increases attention on efficiency class and product information.

So the goal is not ‘cheapest luminaire’. The goal is ‘lowest risk for the required outcome’: right light, right documents, right controls, right service.

Five ways Swiss lighting projects go sideways (and how to stop it early)

If you’ve been through a painful project, these will feel familiar. The good news: each one is preventable if procurement asks the right questions early.

Scope drift disguised as ‘custom’: The supplier says yes to everything. Then reality hits: MOQ, tooling, certification, or thermal limits. The schedule slips and everyone blames procurement.

Procurement move: Make evidence packs, version control, and service commitments contractual before award.

BIM that is decorative, not usable: You get pretty models that don’t match the product. Clashes show up late. Site teams improvise, and the as-built documentation becomes fiction.

Procurement move: Make evidence packs, version control, and service commitments contractual before award.

Performance claims without measurement: Brochures say ‘high efficacy’ and ‘UGR<19’, but there’s no photometry for the chosen optic/output. Lux levels miss, glare complaints rise, and change orders follow.

Procurement move: Make evidence packs, version control, and service commitments contractual before award.

Controls treated as an afterthought: Fixtures are efficient, but they run at 100% in empty spaces. Or the controls are proprietary and fragile. The building saves less than promised, and O&M teams hate the system.

Procurement move: Make evidence packs, version control, and service commitments contractual before award.

Warranty and spares ignored until it hurts: A driver fails, and you learn parts are discontinued or ship-back-only. Swiss clients expect service. Without a plan, your project reputation takes the hit.

Procurement move: Make evidence packs, version control, and service commitments contractual before award.

Question 1: Do you comply with Swiss and EU safety, EMC, and eco-design requirements – and can you prove it fast?

If a supplier can’t produce the right conformity evidence quickly, they will slow you down later. In Switzerland, safety expectations are not negotiable.

Why this matters

Lighting products touch electrical safety, EMC, and environmental rules. Switzerland has its own low-voltage framework for electrical equipment, and offers a Swiss safety mark route. In practice, many Swiss projects still use EU-style documentation (LVD/EMC, RoHS, ecodesign) as a baseline, especially when supply chains cross borders. The key is simple: you don’t buy ‘claims’. You buy evidence tied to the exact SKU in your BOM.

Green flags (what good looks like)

• A clean compliance dossier for the exact model: declarations of conformity, test reports, and label artwork that match the ordering code.
• Clear understanding of light sources vs separate control gear, and how Regulation (EU) 2019/2020 can affect product design and information requirements.
• Component traceability: driver and LED module identifiers, batch codes, and a change log (what changed, when, and why).
• A named compliance owner who can answer ‘why’ questions, not only forward PDFs.
• Documentation discipline: consistent ratings on product, packaging, and datasheets (voltage, IP/IK, class, CCT, wattage).

Red flags (what can go wrong)

• Certificates that look impressive but don’t name the product ID you are buying.
• A single generic declaration used for many products with no product family boundaries.
• No accredited test evidence, or labs that can’t be verified.
• Silent substitutions (drivers, LEDs, gaskets) with no notification to buyer.
• Language gaps: instructions not suitable for your site teams, leading to install mistakes.

Copy-paste RFP clauses

• Supplier shall provide a complete compliance dossier per luminaire family proposed, including electrical safety and EMC evidence and materials compliance where relevant.
• Supplier shall provide a written change-control procedure and notify buyer before any change that impacts performance or compliance (driver, LED, firmware, optics, sealing).
• Supplier shall provide product labels and installation instructions suitable for Swiss project documentation requirements (DE/FR/IT/EN as required).

Evidence checklist

• Declaration of conformity listing applicable directives/standards and exact product IDs
• Electrical safety test reports from accredited laboratories or recognized international certificates
• EMC reports (radiated and conducted as applicable)
• RoHS/REACH statements with component-level evidence for key parts
• Ecodesign / energy label applicability statement for proposed light source(s)
• Sample product labels, packaging labels, and serial/batch traceability example

5-minute live supplier test (ask this on a call)

• Show me the declaration of conformity for this exact ordering code – where is the code on the document?
• If your LED module supplier changes binning, what happens and who approves it?
• What’s your process if the driver model is discontinued?
• Can you provide label artwork and installation instructions in German and French within 3 working days?
• Who signs off compliance internally, and what do they do day-to-day?

Negotiation tip (save budget without adding risk)

Don’t negotiate compliance. Negotiate workflow. Ask the supplier to standardize the evidence pack format and provide it early. That reduces your internal coordination cost, and you can often trade that efficiency for a better unit price.

Switzerland-specific notes

• Switzerland’s low-voltage ordinance references conformity procedure pathways aligned with the EU Low Voltage Directive framework; ‘not always required to CE mark’ does not mean ‘no proof needed’.
• If a Swiss safety mark is requested by your client, confirm early whether it’s required, preferred, or optional and what evidence is acceptable for that owner.
• Keep an internal ‘documentation register’ that maps every BOM line to its evidence file. This stops chaos when auditors or clients ask questions.

Question 2: Can you deliver true bespoke – not just catalog tweaks – without blowing up lead time, MOQ, or risk?

‘Custom’ is a word vendors love. Your job is to turn it into a controlled scope: what changes, how it’s engineered, how it’s validated, and how it’s priced.

Why this matters

True bespoke means the luminaire is shaped around the project: optics, output, CCT/CRI, materials, dimensions, mounting, glare control, and integration constraints. Catalog tweaks can be fine for low-risk areas. But for premium Swiss office and hospitality projects, small deviations create visible problems. Procurement should force the supplier to show engineering discipline, not enthusiasm.

Green flags (what good looks like)

• A customization matrix with boundaries (min/max lengths, wattage ranges, optics families, finish options).
• A sampling plan: prototype, mock-up, and pre-production sample steps, each with acceptance criteria.
• Tooling clarity: cost, timeline, ownership, and what happens if you reorder later.
• A change-control process that freezes parameters at agreed milestones (concept -> mock-up -> pre-production -> mass).
• Evidence of glare and comfort thinking (UGR strategies for offices, beam control for heritage façades).

Red flags (what can go wrong)

• Everything is ‘possible’ but nothing is defined (classic risk signal).
• MOQ surprises after design effort has already been spent.
• Finishes selected from a PDF, then rejected on site because they look different in real light.
• No plan for serviceability (how do you access the driver, replace gaskets, reseal IP products?).
• Bespoke pricing is opaque: tooling hidden in unit price; spares not defined.

Copy-paste RFP clauses

• Supplier shall provide a customization matrix stating which parameters are bespoke versus configurable, including boundaries, cost impact, and lead time impact.
• Supplier shall provide a sampling and mock-up plan including lead times, test scope, and acceptance criteria.
• Supplier shall provide a documented change-control process and version naming for all bespoke iterations.

Evidence checklist

• Customization matrix (ranges, options, exclusions)
• Mock-up plan and sample acceptance template
• Tooling policy (ownership, maintenance, reorder process)
• Material/finish datasheets and samples
• Thermal design approach and any simulation or measured references
• Serviceability notes: driver/module replacement approach, sealing method

5-minute live supplier test (ask this on a call)

• Which parts are new tooling and which are standard? Give me a clear list.
• If we change the beam angle and CCT, what changes in the BOM and what changes in compliance?
• How many design iterations do you include before cost changes?
• Show me how to open the luminaire and replace the driver without damaging the finish.
• What is the lead time for a second batch after the first delivery?

Negotiation tip (save budget without adding risk)

Ask for a ‘design freeze’ milestone with a clear acceptance sign-off. Suppliers love frozen scope because it reduces their risk. In return, you can often negotiate better unit pricing or shorter lead times.

Switzerland-specific notes

• Swiss clients often value clean detailing and long-term maintainability. Make serviceability part of the bespoke definition, not an afterthought.
• For alpine and exposed façade projects, request proof of sealing strategy and coating system suitability early.
• For heritage contexts, plan for slower approvals. Demand physical samples under the project’s real lighting conditions.

Question 3: Do you provide 3D/BIM support that works in coordination – not ‘pretty models’ that clash on site?

Real BIM reduces RFIs and rework. Fake BIM creates a false sense of security until installation day.

Why this matters

Swiss projects are coordination-heavy. Ceiling voids are crowded, tolerances are tight, and expectations are high. BIM deliverables should match the real product: geometry, fixing points, connectors, and metadata. Procurement’s job is to define what ‘usable’ means and make it contractual.

Green flags (what good looks like)

• Revit and IFC models with accurate dimensions and connector positions (cable entry points, driver boxes, access zones).
• Parametric families for common variations (length, output, mounting type) so designers don’t hack the model.
• A clear LOD/LOI approach by phase (concept vs construction vs as-built).
• IES/LDT photometry files that match each configuration, linked to ordering codes.
• Version control: naming rules, change logs, and a deliverables register.

Red flags (what can go wrong)

• Generic ‘block’ models with no access zones or connector positions.
• Metadata missing (power, weight, IP/IK, emergency variants, ordering codes).
• Photometry does not match selected optic or output setting.
• Supplier cannot commit to BIM deadlines; coordination is delayed.
• No as-built handover pack; FM teams inherit a mess.

Copy-paste RFP clauses

• Supplier shall provide BIM/Revit and IFC models with accurate geometry, fixing points, connectors, and required metadata for schedules and coordination.
• Supplier shall provide IES/LDT photometry linked to ordering codes for each proposed configuration and support the selected calculation workflow.
• Supplier shall maintain versioned deliverables and respond to coordination issues within agreed timeframes.

Evidence checklist

• Sample Revit family and IFC export from prior project
• Metadata dictionary (fields, units, naming rules)
• Deliverables register template and example change log
• IES/LDT samples tied to ordering codes
• Installation detail drawings (cut-outs, brackets, tolerances)

5-minute live supplier test (ask this on a call)

• Open your Revit family now: where are the connectors and what metadata fields are included?
• Show me how you handle a length change on a linear luminaire – does the model update correctly?
• How do you name versions so contractors can’t install the wrong revision?
• Can you provide an as-built BIM pack after installation? What’s included?
• Who on your team supports coordination calls and how fast do they respond?

Negotiation tip (save budget without adding risk)

If the supplier can standardize BIM outputs and provide a deliverables register, you reduce coordination meetings and site RFIs. Quantify that internal time saving and use it as leverage in commercial negotiation.

Switzerland-specific notes

• If your team is multilingual, standardize naming and metadata in one language (with mapping if needed) to avoid site confusion.
• For ceiling systems and integrated architectural lighting, demand installation zone and access clearance details.
• Treat BIM deliverables as a schedule item. Late BIM equals late coordination equals late site work.

Question 4: What performance metrics will you guarantee – and how are they proven?

If your performance exists only in marketing, you will pay later. Guaranteed metrics and a verification plan protect procurement.

Why this matters

Performance is a bundle of promises: light levels, uniformity, glare control, color quality, flicker behavior, lifetime, and robustness. In offices, for example, glare matters because people stare at screens. Many design teams aim for UGR <= 19 in office environments. Procurement should demand measured photometry, defined lifetime metrics, and realistic warranties.

Green flags (what good looks like)

• Measured photometry (IES/LDT) for the exact configuration, with calculation support in DIALux/Relux when needed.
• Defined lifetime metrics using industry-standard evidence (LM-80 and TM-21) and a clear lumen maintenance commitment.
• Color consistency in writing (e.g., 3 SDCM), and a sample approval process for visible areas.
• Dimming behavior that is stable at low levels and does not introduce objectionable flicker.
• Protection and robustness: IP/IK options, surge protection strategy, and thermal design aligned to the environment.

Red flags (what can go wrong)

• ‘50,000 hours’ with no definition (L70? L80? B10? at what ambient temperature?).
• UGR and glare claims without context; UGR depends on installation and viewing angles.
• Flicker dismissed as ‘not a problem’ with no test method or driver details.
• Surge protection assumed to be ‘standard’ without a rating.
• Photometry and datasheets for one optic, but you are buying another.

Copy-paste RFP clauses

• Supplier shall provide guaranteed performance values per configuration: lumen output, system power, efficacy, CRI/R9, color consistency, lifetime metric, and IP/IK as relevant.
• Supplier shall provide supporting evidence (photometric reports/files, electrical data, lifetime data) and define measurement conditions.
• Supplier shall propose verification steps: mock-up measurement, FAT, and SAT where required.

Evidence checklist

• Photometric report + IES/LDT files per configuration
• Lifetime evidence: LM-80 reports and TM-21 projections, plus stated assumptions
• Color binning and SDCM commitment in writing
• Driver datasheets including protections and dimming behavior
• Surge protection rating and basis
• Environmental and finish documentation for the use case

5-minute live supplier test (ask this on a call)

• Show me the IES/LDT file for this exact optic and output setting. Where is it linked to the ordering code?
• What lifetime metric do you guarantee and what conditions does it assume?
• What is your SDCM target for this project and how do you control it across batches?
• How does dimming behave below 20%? Any flicker or instability?
• What is your surge protection rating for outdoor and exposed installations?

Negotiation tip (save budget without adding risk)

If the supplier is confident, ask them to commit to a clear acceptance test and a fix-at-cost clause for measurable non-compliance. Suppliers who build quality into the product will often accept this – and it protects you from cheap-but-risky alternatives.

Switzerland-specific notes

• For offices and screen-heavy spaces, insist on glare and comfort strategy. UGR is an installation outcome; ask for spacing and mounting guidance.
• For outdoor and façade applications, demand coating and sealing suitability for winter conditions and cleaning chemicals.
• For Minergie-focused projects, evaluate ‘effective lux per watt in the actual room’, not just lumens on a datasheet.

Question 5: How will your luminaires integrate with smart controls and BMS – and will we be locked in?

Energy savings often live in controls, not in the LED chip. But closed ecosystems can trap owners. You want smart, open, and maintainable.

Why this matters

Swiss buildings increasingly expect zoning, scheduling, occupancy response, and daylight harvesting. Interoperability matters because buildings live longer than apps. Ask for open protocol support (where appropriate) and a full commissioning and documentation plan.

Green flags (what good looks like)

• Support for open protocols (e.g., DALI-2 for lighting networks; KNX and BACnet gateways when building integration is needed).
• Clear commissioning workflow: addressing plan, groups, scenes, sensor placement, and as-built documentation.
• Interoperability clarity: what is open, what is proprietary, and what data can be exported or integrated.
• Defined behavior at low dim levels, including flicker considerations and minimum stable output.
• Maintenance plan: how devices are replaced, how settings are backed up, and how firmware updates are handled.

Red flags (what can go wrong)

• App-only control with no long-term support or export path.
• No as-built documentation; operators can’t maintain scenes or sensor settings.
• Commissioning delegated without method statements; results vary by installer.
• Cybersecurity ignored for connected systems (default credentials, unclear update policy).
• Sensors chosen without coverage design, leading to nuisance switching and complaints.

Copy-paste RFP clauses

• Supplier shall propose an interoperable controls architecture and provide an addressing and commissioning plan.
• Supplier shall provide as-built control documentation: group/scene mapping, device schedules, and wiring/network diagrams.
• Supplier shall state cybersecurity and firmware update policies for connected devices (where applicable).

Evidence checklist

• Controls architecture diagram and device list
• Commissioning method statement and addressing plan template
• As-built documentation template (device schedules, groups, scenes)
• Gateway datasheets and protocol statements
• Sensor coverage guidance and tuning approach
• Dimming/flicker information for proposed drivers

5-minute live supplier test (ask this on a call)

• Show me a completed as-built documentation pack from another project (redacted).
• If the gateway fails, what happens? Can the lighting still operate locally?
• How do we back up settings so FM can restore them after a replacement?
• What data can we export to BMS analytics?
• What is your policy on firmware updates and security patches?

Negotiation tip (save budget without adding risk)

Ask suppliers to deliver commissioning as a defined service package with acceptance criteria. You can often reduce unit price by bundling commissioning across multiple zones or phases – while keeping outcomes consistent.

Switzerland-specific notes

• For portfolio owners (banks, retail, rail assets), ask about repeatability: can the same configuration be rolled out across sites with minimal tuning?
• Align early with the client’s IT rules (network segmentation, credentials management) if anything is connected.
• Make the supplier quantify savings from controls under your operating profile. Buzzwords are not a business case.

Question 6: Can your supply chain meet Swiss logistics, customs, and warranty realities – including spares and response time?

Great light on paper is useless if it arrives late, arrives damaged, or can’t be serviced quickly. Swiss clients expect service discipline.

Why this matters

Bespoke lighting often crosses borders, which adds shipping and customs risk. Even if the hardware is perfect, weak packaging and unclear Incoterms can break your schedule. Procurement should make logistics, spares, and warranty execution part of supplier selection – not an afterthought.

Green flags (what good looks like)

• Clear Incoterms and responsibilities (who handles import documentation, duties, VAT, delivery to site).
• Packaging designed for the product: protection for optics, finishes, and long linear profiles.
• A spares strategy: recommended spares list, parts availability period, and replacement lead times.
• A clear DOA and RMA workflow with response time targets.
• Lead time transparency: engineering, tooling, production, testing, shipping broken out by step.

Red flags (what can go wrong)

• Lead times that ignore bespoke steps or peak season logistics.
• No spare parts plan; parts are ‘available later’ until they aren’t.
• Warranty language that is difficult to execute (ship-back only, slow response, vague exclusions).
• Weak packaging leading to cosmetic damage; Swiss clients reject visible defects.
• Single-language manuals that confuse site teams.

Copy-paste RFP clauses

• Supplier shall provide Incoterms, lead times by phase (sample, pilot, production), and a logistics plan including packaging standards and damage handling.
• Supplier shall provide a spare parts and service plan including recommended spares, availability period, and replacement timelines.
• Supplier shall provide multilingual installation and maintenance documentation as required.

Evidence checklist

• Packaging specification or test approach (drop/vibration logic)
• Lead time breakdown by phase and step
• Spare parts list with pricing, MOQ, and availability period
• Warranty terms with claim steps and timelines
• Sample manuals and maintenance guides with language options

5-minute live supplier test (ask this on a call)

• What Incoterms do you recommend for Switzerland and why?
• Show me your packaging spec for linear luminaires – how do you prevent bending and finish damage?
• How long will drivers and LED modules be available for this family? Put it in writing.
• What is your DOA replacement process and typical turnaround time?
• If we need a replacement part in 72 hours, what’s the realistic path?

Negotiation tip (save budget without adding risk)

Negotiate service logistics like you negotiate price. A slightly higher unit price can be cheaper than one delayed handover. Ask for a small local spares stock for critical items and negotiate it as part of the package.

Switzerland-specific notes

• If acceptance depends on finish quality, define cosmetic tolerances and replacement timelines.
• For phased rollouts, align binning and production lots to keep appearance consistent across phases.
• Define who supports commissioning and troubleshooting: local partner vs remote support, escalation steps, and response times.

Question 7: What’s the total cost of ownership (TCO) and sustainability story – and does it hold up under real operations?

Cheap fixtures are expensive when you count energy, failures, labor, downtime, and replacements. TCO turns procurement into strategy.

Why this matters

Most lighting cost happens after installation: electricity and maintenance. Switzerland’s focus on efficiency, comfort, and value preservation makes TCO a powerful decision tool. Sustainability should be practical: repairable design, materials transparency, and end-of-life handling.

Green flags (what good looks like)

• A transparent TCO model with assumptions (hours, tariff, maintenance) and sensitivity ranges.
• Repairability: replaceable drivers and LED modules, accessible fasteners, and documented service steps.
• Environmental documentation where available (EPD, material declarations) and realistic end-of-life guidance.
• Warranty aligned to design life, plus a parts availability commitment.
• Controls included in the business case (savings from occupancy/daylight/scheduling).

Red flags (what can go wrong)

• TCO claims with no assumptions (marketing math).
• Sealed luminaires where small failures force full replacement.
• Sustainability is only ‘we use LED’ – no repair, no transparency, no end-of-life plan.
• Warranty exclusions that quietly remove your real use case (dimming, outdoor exposure, cleaning).
• Controls omitted; systems burn at full output when spaces are empty.

Copy-paste RFP clauses

• Supplier shall provide a TCO calculation comparing baseline and proposed solutions, stating assumptions and providing sensitivity ranges.
• Supplier shall provide repairability and spare-parts strategy, including service instructions and parts availability commitments.
• Supplier shall provide sustainability documentation where available and guidance for recycling or take-back options.

Evidence checklist

• TCO worksheet with assumptions and sensitivity cases
• Service manual showing driver/module replacement steps
• Parts availability statement and recommended spares
• Environmental documentation (EPD if available, material compliance statements)
• Take-back/recycling policy statement (where offered)

5-minute live supplier test (ask this on a call)

• What hours and tariff assumptions are in your TCO model? Show me the spreadsheet.
• How many minutes does it take to replace the driver? What tools are required?
• If we reorder in 5 years, will this family still exist? What is your plan?
• Do you have an EPD or materials declaration for this product line?
• How do you quantify savings from controls under our operating schedule?

Negotiation tip (save budget without adding risk)

If the supplier offers a longer warranty, ask for parts availability in writing too. Warranty without parts is paperwork. You can also negotiate modularity: standardize drivers/modules across multiple luminaire families to simplify spares.

Switzerland-specific notes

• For Minergie-aligned projects, focus on measured outcomes: installed power, controls, and actual operating hours.
• Swiss owners often care about value preservation. Ask how the supplier supports the product family through refurbishment cycles.
• If ESG reporting matters, request serial-level traceability so the client can audit what was installed.

Application playbooks: how the 7 questions change by project type

The seven questions stay the same, but the ‘stress points’ change by application. Use these mini playbooks to focus your time where it matters most.

1) Offices and education (screen work, comfort, complaints)

In offices, complaints usually come from glare, poor color consistency, and annoying control behavior. That’s why designers often target glare limits like UGR <= 19 for office tasks, and why stable dimming matters. Procurement should push Question 4 (metrics) and Question 5 (controls) harder here than anywhere else.

• Demand photometry that matches the actual optic and output setting (not a generic report).
• Ask for the supplier’s spacing and mounting guidance to hit comfort targets.
• Require flicker information and low-dim stability (meeting rooms at 5-10% output is a common stress case).
• Make as-built controls documentation a deliverable – FM teams live with it for years.

2) Retail and hospitality (visual quality, scenes, brand feel)

Retail and hotels care about ‘feel’. CRI alone is not enough. You want high R9, consistent color, and scene flexibility. Bespoke is often about beam shaping, shielding, and finish quality. Here, Question 2 (true bespoke) and Question 7 (TCO plus serviceability) become the decision-makers.

• Ask for a sample approval plan: color, finish, and dimming scenes must be validated in a mock-up.
• Require binning and SDCM commitments so different batches don’t look mismatched across floors.
• Check serviceability: hotel maintenance hates sealed fixtures that require full replacement for a driver failure.
• Ask how the supplier supports scene updates over time (new layouts, new tenants, seasonal remerchandising).

3) Façades and outdoor (weather, corrosion, light pollution)

Outdoor failure is expensive because access is expensive. In Swiss winter conditions, sealing, coatings, and surge protection decide survival. Also, community expectations around spill light are rising. For outdoor scopes, push Question 4 (robustness) and Question 6 (spares and warranty) harder than usual.

• Ask for IP/IK options that match exposure, and confirm how the product is resealed after service.
• Request coating system details for corrosive or high-UV environments and define cleaning compatibility.
• Confirm surge protection strategy and grounding assumptions.
• Ask for cut-off / shielding options to reduce spill light and glare to neighbors.

4) Industrial, parking, and infrastructure (reliability, safety, downtime)

In industrial and infrastructure settings, reliability and downtime dominate. Your KPI is not ‘nice light’. It’s ‘no failures during critical operations’. Prioritize simple, serviceable designs, strong warranty execution, and clear acceptance tests.

• Require a spares plan and a realistic replacement timeline (24-72 hours for critical sites, if possible).
• Ask for driver quality strategy: derating, thermal design, protections, and replacement process.
• Demand clear labeling and traceability so maintenance can order the correct parts fast.
• Insist on FAT/SAT steps for critical areas (even a small test prevents huge downstream cost).

5) High-end architectural systems (linear, coves, custom details)

Architectural systems fail when tolerances and interfaces are vague. This is where BIM accuracy and change control are non-negotiable, and where small finish defects become ‘reject’. Make sure you lock interfaces early: mounting, tolerances, driver locations, access hatches, and cable routing.

• Demand detailed installation details and interface drawings, not only product catalogs.
• Require BIM models with connector positions and access zones so ceilings can be coordinated correctly.
• Define cosmetic tolerances and inspection method at mock-up stage.
• Ask for consistent lot control (color and output) across phased deliveries.

Industry case study: SBB Bern smart lighting retrofit (what procurement can learn)

A Swiss example reported by the Solar Impulse Foundation describes a pilot retrofit by Swiss Federal Railways (SBB) in Bern. SBB cooperated with LEDCity to retrofit one building with an intelligent lighting system using integrated radar and light sensors plus per-luminaire radio modules. The report states that electricity consumption was reduced by 85%, and savings were verified using sensor data evaluated via gateways and dashboards.

Treat the percentage as context-dependent (baseline hours, tuning quality, and space type matter). The key procurement takeaway is universal: big savings tend to come from the system (LED + controls + verification), not from fixtures alone.

Three procurement lessons from the case

• Measure first, then buy: baseline waste (hours, zones) is where the business case lives.
• Controls need ownership: commissioning and tuning decide whether savings are real or theoretical.
• Data makes savings defendable: dashboards and logs reduce arguments and help scaling across portfolios.

Procurement toolkit

A) The 2-page evidence pack to demand from every bidder

• Compliance dossier index + declarations and test evidence
• BIM sample + metadata dictionary
• IES/LDT photometry linked to ordering codes
• Controls architecture + commissioning plan
• Warranty + spares availability commitment
• TCO model with assumptions and sensitivity ranges

B) 100-point supplier scorecard (adjust weights to your risk)

Start with this practical weighting (100 points total) and adjust based on your project pain points:

• Compliance and documentation: 20
• Bespoke engineering capability and change control: 15
• BIM/3D deliverables and coordination support: 15
• Proven performance metrics and verification plan: 15
• Controls, interoperability, and commissioning: 15
• Logistics, spares, and warranty execution: 10
• TCO and sustainability: 10

Hard rule: any bidder missing critical evidence (no photometry, no compliance dossier, no service plan) is ‘no-bid’ regardless of price.

C) RFP clause library (plug-and-play)

Use these clauses to remove ambiguity. Short is good. Enforceable is better.

• Supplier shall provide a deliverables register listing all required documents and their due dates (BIM, photometry, compliance, manuals, as-builts).
• Any component substitution that impacts performance or compliance (LED, driver, optics, firmware, sealing) requires written buyer approval before shipment.
• Photometric files (IES/LDT) shall match the exact configuration supplied, including optic, output setting, and CCT.
• Supplier shall provide a mock-up unit for approval, and mass production shall not start until written approval is received.
• BIM models shall include connector positions, access zones, and metadata fields agreed with the project team.
• Supplier shall provide as-built controls documentation (groups, scenes, sensor settings, device schedule) at handover.
• Warranty shall include clear claim steps and replacement timelines; DOA items shall be replaced within an agreed timeframe.
• Supplier shall provide a spare parts schedule and guarantee parts availability for an agreed period.
• Packaging shall be suitable to prevent cosmetic damage; cosmetic acceptance criteria shall be defined at mock-up stage.
• Supplier shall provide multilingual installation and maintenance instructions as required (DE/FR/IT/EN).
• Supplier shall provide a TCO model with assumptions and sensitivity ranges, including controls savings where applicable.
• Supplier shall support FAT/SAT steps as defined by the project and provide test records.
• Supplier shall maintain batch/serial traceability and provide installation zone mapping on request.
• Controls system shall be interoperable and avoid vendor lock-in where possible; protocols and gateway dependencies shall be stated.
• Commissioning shall be delivered as a defined scope with acceptance criteria and an issues close-out plan.
• For IP-rated products, supplier shall provide service and resealing instructions to maintain IP rating after maintenance.
• Supplier shall state surge protection strategy and grounding assumptions for outdoor installations.
• Supplier shall provide coating/finish specifications and cleaning compatibility guidance for exposed or high-touch areas.
• Delivery schedule shall include phase breakdown (engineering, tooling, production, testing, shipping) and identify critical path risks.
• Supplier shall provide a single point of contact responsible for documentation, coordination, and escalation.

D) Glossary (so everyone on the project speaks the same language)

DoC: Declaration of Conformity – the document where a manufacturer declares the product meets applicable requirements.

LVD: Low Voltage Directive – EU framework for electrical safety for certain voltage ranges.

EMC: Electromagnetic Compatibility – limits and immunity so the product does not interfere with other equipment.

RoHS: Restriction of Hazardous Substances – limits certain substances in electrical/electronic equipment.

Ecodesign 2019/2020: EU regulation setting ecodesign requirements for light sources and separate control gear.

IES/LDT: Photometric file formats used in lighting calculation tools.

LM-80 / TM-21: Standards used to report LED lumen maintenance and project lifetime.

SDCM: Color consistency metric; lower is more consistent. 3 SDCM is a common target for premium spaces.

UGR: Unified Glare Rating – a glare metric for indoor workplaces. It depends on the installation.

DALI-2: Digital Addressable Lighting Interface – lighting control standard often used for commercial projects.

KNX / BACnet: Common building integration protocols used for BMS.

FAT / SAT: Factory Acceptance Test and Site Acceptance Test – structured checks before and after installation.

Incoterms: Standardized trade terms that define delivery responsibilities (e.g., DAP, DDP).

TCO: Total Cost of Ownership – energy + maintenance + replacements + downtime impacts over life.

E) Copy-paste email to request the evidence pack

Subject: Request for evidence pack – Swiss bespoke lighting tender

Hi [Name],

To evaluate your bid fairly, please send a 2-page evidence pack for the proposed luminaire families by [date]. Please include:
– Declarations of conformity + supporting test evidence
– IES/LDT photometry tied to ordering codes
– BIM/Revit/IFC samples + metadata dictionary
– Controls architecture + commissioning plan
– Warranty terms + spare parts availability statement
– TCO model with assumptions

If any item is not available, please state when it will be available and why.

Thanks,
[Your name]
[Company / Project]

F) FAT/SAT mini-plan (factory and site acceptance testing)

• FAT: verify ordering codes, labels, electrical function, dimming behavior, and sample finish quality under real light.
• FAT: confirm batch/serial traceability and record it against the shipping list.
• SAT: measure critical spaces against agreed points; validate control scenes and sensor behavior; confirm emergency lighting function where applicable.
• Handover: deliver as-built documentation (device schedules, groups/scenes, maintenance notes) and an issues log with close-out dates.

Conclusion

Swiss procurement teams win when they turn ‘custom lighting’ into a controlled, evidence-based process. Ask these seven questions and demand proof: compliance, true bespoke capability, BIM depth, proven performance, controls integration, logistics and warranty realism, and TCO plus sustainability. When you do that, weak suppliers drop off quickly, and strong partners become obvious.

Actionable next step: take your current shortlist and request the evidence pack. If a supplier can’t respond clearly within a week, they are telling you how the project will feel later.

Key public sources referenced (for traceability)

• Swiss Federal Office of Energy (BFE) – Buildings energy and CO2 context
• Swiss Federal Office of Energy (BFE) – Energy label for lamps (new label since 1 September 2021)
• EUR-Lex – Regulation (EU) 2019/2020 (ecodesign requirements for light sources and separate control gear)
• ESTI – Ordinance on electrical low-voltage equipment; Swiss safety mark information
• S. EIA – CBECS lighting energy share in commercial buildings
• S. DOE – lighting share of building electricity and controls guidance (flicker info and recommended practice context)
• Solar Impulse Foundation – SBB Bern smart lighting retrofit implementation story
• IEA policy database – SIA building code and Minergie label family overview
• ERCO lighting knowledge – UGR guidance for office glare targets

FAQ (quick answers procurement teams actually ask)

Do we need a Swiss safety mark for luminaires?

Sometimes yes, often no. It depends on the owner, the authority, and your procurement route. Treat it like a client requirement, not a default assumption. What never changes: you need a complete safety and EMC evidence pack tied to the exact product you buy.

Is ‘CE’ enough for Switzerland?

CE-style documentation is often used as a baseline, but it’s not a magic shield. If the evidence is weak or mismatched to your ordering code, you still carry risk. Always request test evidence and keep it mapped to the BOM.

How do we avoid being fooled by ‘custom’ claims?

Ask for a customization matrix plus a sampling plan with acceptance criteria. If the supplier can’t define boundaries, costs, and lead times, it’s not controlled bespoke – it’s improvisation.

What is the fastest way to compare suppliers fairly?

Use the 2-page evidence pack and the 100-point scorecard. Price comes after evidence. If evidence is missing, treat it as a no-bid.

Where do delays usually come from?

Most delays come from late design iterations, missing BIM/photometry, and unclear controls commissioning scope. Lock deliverables and due dates early, and freeze scope in stages.

What should we validate in a mock-up?

Validate what humans notice: glare, color consistency, finish appearance, dimming behavior, and sensor response. Also validate what operators suffer: access for maintenance and resealing for IP-rated products.

How many spare parts should we buy?

There is no single number. Start with critical parts (drivers, modules, optics) and base quantity on failure risk and access cost. For hard-to-access areas, spares can be cheaper than downtime.

What’s one clause that prevents most headaches?

A strict change-control clause: no component substitutions without written buyer approval. It prevents silent substitutions that cause color shift, failures, or compliance gaps.