By Anna Qiu · VOC Lighting · Last updated: 22 October 2026
A price per metre is useful only when suppliers include the same components and performance. Compare the same mounting type, light output, optics, finish, controls, warranty and delivery basis. A lower fixture price can be offset by extra drivers, wiring, installation time or transport charges.
| Cost block | What to compare |
|---|---|
| Luminaires and optical components | Total installed length, module count, delivered lumens, distribution, diffuser or louvre, profile and finish. |
| Drivers and controls | Driver type and quantity, load compatibility, dimming protocol, control zones and emergency-lighting requirements where applicable. |
| Installation and access | Connectors, feeds, suspension or mounting kits, wiring routes, commissioning, access provisions and labour. |
| Logistics and commercial terms | Carton dimensions, handling, freight, spares, documentation, warranty scope and the agreed delivery basis. |
The largest cost block varies by project. Separate component and installation costs in the BOQ rather than assuming that the LED board, driver count or fixture count always dominates.
| Option | Potential saving | Conditions to verify |
|---|---|---|
| Standardise compatible lengths and variants | Fewer production setups, spare types and unusual joints. | Retain every length, CCT and optic the approved design actually needs. |
| Use longer factory-built sections where practical | Fewer end caps, joints and some assembly tasks. | Compare the same total length and light output. Check transport limits, handling, mounting and replacement access. Driver count may remain unchanged. |
| Evaluate shared drivers where the system supports them | Potential reduction in driver quantity and associated hardware. | Confirm constant-current or constant-voltage architecture, output range, loading, cable limits, voltage drop, control zones and failure consequences. |
| Select a profile for the actual load | Less material, weight or shipping volume. | Verify thermal performance, rigidity and mounting strength for the complete assembly at its intended ambient temperature. |
| Choose suitable optics | Avoid paying for optical features the application does not need. | Check distribution, source visibility, task-plane illuminance and glare using the selected optic. Mounting height alone is insufficient. |
| Compare a matched BOQ | Expose unnecessary options and missing items in quotations. | Include accessories, installation, documentation, warranty and logistics. Custom manufacture is not automatically cheaper. |
Allow field cutting only for components that the manufacturer explicitly permits to be cut on site, and follow the specified cutting, wiring and reassembly instructions. A complete linear luminaire should not be treated as freely cuttable.
Illustrative calculation only: the following figures are invented to demonstrate the method. They are not VOC prices, a customer case study or a claimed saving. Both options contain 24 metres of lighting. The same driver quantity is retained deliberately: fewer physical sections do not automatically mean fewer drivers. The example assumes compatible modules, equivalent delivered output per metre and the same control arrangement; lighting and thermal performance still require verification.
| Item | A: 20 × 1.2 m sections | B: 10 × 2.4 m sections |
|---|---|---|
| Total installed length | 24 m | 24 m |
| Luminaire sections, excluding drivers | 20 × US$45 = US$900 | 10 × US$90 = US$900 |
| Compatible drivers | 10 × US$30 = US$300 | 10 × US$30 = US$300 |
| Connection and mounting accessories | US$180 | US$130 |
| Installation labour | US$400 | US$300 |
| Freight and handling | US$150 | US$220 |
| Illustrative installed total | US$1,930 | US$1,850 |
In this example, the net reduction is US$80, or approximately 4.1%, after higher freight is included. That result depends on the assumed accessory and labour savings. If longer sections require extra handling or more expensive replacement arrangements, the advantage may disappear. Taxes, duties, commissioning, energy and future maintenance are excluded from both totals and must be added where relevant.
Changing colour performance without approval. Keep the specified CRI and any additional colour-quality requirements, such as R9 or TM-30 criteria where required. A higher CRI is not automatically necessary for every application; approve changes against the intended use and representative samples.
Selecting drivers by price alone. A lower-cost driver can be acceptable if it meets the required electrical, dimming, flicker, reliability and compliance criteria. Test the proposed driver with the actual control system, particularly at low output. Specify accessible service locations rather than assuming drivers must be inaccessible above a closed ceiling.
Reducing the profile without validation. A smaller or thinner section can work if the complete luminaire meets thermal and mechanical requirements. Insufficient heat dissipation may raise LED operating temperature and accelerate lumen depreciation.
Removing or changing optics without recalculation. A diffuser, lens or louvre affects distribution, source appearance and efficiency. A substitution requires updated calculations and, where appropriate, a mock-up; a high ceiling does not by itself guarantee acceptable glare.
Mixing unmatched colour batches. The same nominal CCT does not guarantee a visual match. Agree colour consistency and binning requirements, check samples and plan matching spares. Visible differences after installation may require costly replacement of modules or sections.
Technical background: IES explains photometric files, while ERCO explains how glare evaluation depends on the installation and observer. Driver loading and wiring limits must come from the selected driver’s current technical documentation.
Ask VOC Lighting to quote the proposed linear and office lighting configuration against your drawings and BOQ. For project-specific lengths, finishes or controls, review the OEM and ODM service options. Availability and documentation should be confirmed for each proposed model.
| Quotation item | What must be agreed |
|---|---|
| Model and configuration | Length, wattage, delivered output, optic, mounting, finish, CCT, colour quality and controls. |
| MOQ and order grouping | Minimum quantity for the selected model and whether different lengths, finishes or CCTs count as separate order variants. |
| Lead time and phased delivery | Production timing after approvals, dispatch schedule, minimum release quantity, storage charges and freight. MOQ alone does not establish phased-delivery terms. |
| Photometric and technical files | Which exact configurations have suitable IES or other photometric data, drawings, installation instructions and relevant test reports. |
| Destination-specific compliance | Applicable requirements and model-specific evidence. For EU destinations, request the applicable EU Declaration of Conformity and supporting documentation. |
| Warranty and service | Warranty conditions, access requirements, replaceable parts, matching spares and the process for handling faults. |
CE marking should not be described as a generic third-party product certificate; the manufacturer is responsible for applicable conformity assessment and documentation. Requirements depend on the product and destination. See the European Commission’s CE marking guidance. If US utility incentives are relevant, check the exact model on the DLC Qualified Products List; DLC qualification is distinct from electrical safety certification.
No. They may reduce joints and assembly work, but longer cartons, handling constraints and replacement access can offset the saving. Compare complete installed cost at equivalent lighting performance.
Only when the system is designed for that arrangement. Confirm output range, load compatibility, wiring limits, control zones and the impact of a driver failure. A visually continuous run may still require several drivers.
Often, yes. Evaluate standard lengths, compatible variants, accessories, installation and purchasing terms first. Preserve the agreed colour-quality requirements and confirm the selected model’s documented performance.
Request model-specific MOQ and production timing with the quotation. Custom lengths, finishes, controls and approval requirements can affect both. Agree phased deliveries separately, including release quantities, storage and freight.
Send the drawings, ceiling details, lighting schedule or BOQ, mounting heights, destination, required lighting performance, control requirements and delivery programme. Ask for a line-by-line comparison that identifies proposed changes and the documentation available for each model.
Request a matched project quotation: send your drawings and lighting schedule to VOC Lighting. Ask the team to separate potential savings from changes that require design approval, and to confirm documentation availability before you approve a model.
Anna Qiu writes for VOC Lighting on commercial lighting specifications and project procurement. For product-specific engineering, commercial terms and supporting documentation, contact the VOC Lighting team.
