How to Quote and Run a Commercial Industrial Lighting Installation

What you will learn

• How CIBSE LG1 lux standards set the illuminance targets for warehouses, factories, and industrial units - and why missing the vertical plane calculation causes the most complaints.
• What a complete commercial industrial lighting quote must include beyond the luminaires: access equipment, controls commissioning, WEEE disposal, and handover documentation.
• Why lighting controls should be specified before the quote is issued, not added after - and how presence detection on racking aisles compresses the client's payback period.
• How to phase a large LED installation on a live manufacturing or distribution site without disrupting operations.
• What commissioning and handover documentation an industrial lighting project must produce: EIC, lux verification records, DALI address map, and emergency test log.

Quoting a commercial industrial lighting installation looks straightforward until the site survey is done and three things become clear: the ceiling is three metres higher than expected, the client wants zone-level controls integrated across every aisle, and the existing emergency lighting needs tying into the new scheme before the job can be signed off. Industrial lighting contracts regularly run over budget not because the luminaire specification is wrong but because the scope of everything around the fixtures was not defined before the quote was signed. This guide walks through the process from the first site visit to handover documentation, covering what to measure, what to include in the quote, and how to manage a live-site installation without disrupting the client's operations.

Key Takeaways

• How CIBSE LG1 lux standards determine the specification for warehouses, factories, and industrial units
• What a complete commercial industrial lighting quote must include beyond the fixtures themselves
• Why lighting controls increase the upfront cost but significantly compress the client's payback period
• How to phase a large installation on a live site without shutting operations down
• What commissioning and handover documentation an industrial lighting project must include to satisfy compliance

Site Survey: What to Record Before Any Design Work

Every commercial industrial lighting project starts with a site survey. Desktop scoping from floor plans alone is not enough. Ceiling heights vary across the same building, existing cable runs may not support a change in circuit load, and the client's usage patterns determine which lux targets apply under CIBSE guidance.

At the survey, record:

• Floor area by zone - open warehouse, racking aisles, packing benches, offices, loading bays, and any mezzanine levels
• Ceiling heights in each zone - this drives luminaire selection and access equipment hire
• Existing fittings: type, wattage, circuit layout, and switching zones
• Emergency lighting positions and the current test and maintenance regime
• Client operating hours and which areas are continuously manned versus used intermittently

CIBSE LG1 - The Industrial Environment, alongside BS EN 12464-1, sets the illuminance targets for UK industrial premises. For open warehouse areas, the standard specifies 100 lux for unmanned storage and 200 lux for continuously manned spaces, both measured at floor level. Manned gangways between racking require 150 lux at floor level, and the storage rack face itself requires 200 lux - a separate calculation because the critical plane is vertical rather than horizontal. Missing the vertical illuminance calculation in a high-bay racking installation is one of the most consistent sources of post-installation complaints, and it is almost always traced back to a survey that recorded dimensions on the horizontal plane only.

Take photographs at the survey and annotate floor plans with your zone measurements. Photometric design software is only as accurate as the input data.

Photometric Design and Luminaire Specification

The photometric design translates the lux requirements into a luminaire schedule: type, wattage, quantity, beam angle, and mounting position per zone. For most commercial industrial work, the choice sits between UFO high bays and linear high bays. UFO fittings suit open-area grid layouts. Linear high bays work better in racking aisles where vertical illuminance on the shelf face is the primary target.

Ceiling height is the primary selection driver. For heights above six to eight metres - the standard threshold for high-bay fittings - beam angle and lumen output must be matched to the aisle or bay width to avoid dark spots at floor level. Modern high-efficacy LED high bays run at 95 lumens per watt or above. Fittings below 80 lm/W may look cost-effective on a unit price basis but erode the energy savings that justified the project in the first place.

Controls should be specified at this stage, not added as an afterthought. The three most common control strategies for industrial lighting are:

• Presence and absence detection (PIR): appropriate for racking aisles used intermittently. Lights activate on entry and dim or switch off after a set period of inactivity. This suits any warehouse where aisle activity is irregular across the shift.
• Daylight-linked dimming: suitable for areas with rooflights or industrial glazing where natural light varies across the day. A well-positioned photocell dims artificial output as daylight levels rise.
• DALI dimming with addressable control: used on larger schemes where the client wants individual circuit addressing, often integrated with a building management system. DALI adds commissioning time but gives the building owner long-term flexibility to adjust zones as the operation changes.

Adding controls raises the equipment cost but compresses the payback period. Controls on intermittently used racking aisles reduce active hours significantly compared to a permanently-on scheme. The specification for controls needs to be part of the agreed scope before the quote is issued, not a discussion that happens after the order is placed.

Writing the Quote: What Gets Left Out

The luminaire cost is the most visible number in an industrial lighting quote. It is rarely the cost that causes the problems. The charges that get missed are what create the margin erosion and the disputes.

A complete quote for a commercial industrial lighting installation should include:

1. Luminaires - supply and fix, listed by zone with quantity, wattage, and product specification reference. Group by zone so the client can review and approve each area separately.
2. Control gear - sensors, DALI drivers, switching panels, or BMS interface as specified in the lighting design. If controls are optional, quote them as a clearly labelled addition so the client can make an informed decision.
3. Access equipment - MEWP hire for the installation duration. For ceilings above six metres, this is not an incidental cost. On a typical 5,000 sq ft warehouse zone at eight metres, a scissor lift or boom lift hire for two to three days represents a meaningful proportion of the contract value. Confirm the ceiling height at survey, not from the drawings.
4. Cable and containment - new circuits, conduit, trunking, or modifications to the existing distribution board. State the board modifications clearly: if the existing DB is near capacity, a new sub-board may be required and that needs pricing before the quote goes out.
5. Emergency lighting - any new or replacement emergency luminaires, plus compliance testing of the integrated scheme on completion. If the new scheme touches any existing emergency circuit, the escape route lighting must be retested in full.
6. WEEE disposal - removal and licensed disposal of old fluorescent or high-intensity discharge fittings. Volume matters on an industrial site: a hundred-unit fluorescent replacement generates a significant quantity of glass and electronics that cannot go to general waste.
7. Photometric verification - post-installation lux measurement to confirm the designed targets are achieved. Some main contractors and facilities managers require a written report. Build the measurement time into the programme, not into contingency.
8. Controls commissioning - DALI addressing, PIR sensitivity and timing, zone grouping and scene setting. This is a separate line from supply and fix because it typically takes a skilled engineer several hours on even a modest scheme. Clients who are not told this is a separate activity often treat it as a dispute when the invoice arrives.
9. Handover documentation - luminaire schedules, control system configuration record, emergency test log, and electrical test certificates.

State what is excluded as explicitly as what is included. Common exclusions worth naming: structural fixings to steel purlins requiring specialist anchor systems, BMS integration beyond the agreed DALI gateway point, asbestos-containing materials found in existing fittings or ceiling panels, and work to the incoming supply beyond the agreed distribution board scope.

For context on project scale, UK installer cost data from Renewable Energy Hub (January 2026) gives rough reference figures: a 20,000 sq ft warehouse installation runs to approximately £25,000 all-in, while a 50,000 sq ft industrial facility can reach £65,000-£75,000, with the higher end reflecting larger fixture counts and controls complexity. These are rough estimates that vary by ceiling height, specification, and site access.

Managing a Live-Site Installation

Large industrial lighting projects almost always need to be phased. A manufacturing facility or distribution centre cannot go dark for two days. The programme must reflect the client's operational constraints from the outset.

Standard phasing approach for a live commercial site:

1. Divide the building into zones that can be isolated without affecting operations in adjacent areas. Map this against the client's shift pattern before finalising the programme.
2. Agree access windows with the facilities or operations manager in writing. Confirm which areas must remain live at all times: freezer zones, 24-hour production lines, security-monitored areas, and active loading bays.
3. Plan MEWP routes in advance. Racking aisles may be too narrow for standard access equipment. Confirm with the warehouse manager whether pallets need clearing from access zones before each session.
4. Agree pallet movement requirements in writing before any lift work begins. High-bay installation involves working directly above racking. A written safe working zone agreement for each session removes the grey area if an incident occurs.
5. Price evening or weekend working correctly in the contract. A flat day rate does not cover an out-of-hours shift. Labour uplifts, additional supervision, and travel costs need to be agreed before the order is placed.

Testing, Commissioning, and Handover

Testing on an industrial lighting contract covers three distinct activities, each with its own documentation.

Electrical testing covers all new circuits and modifications per IET Wiring Regulations (BS 7671). An Electrical Installation Certificate is required for all notifiable work. If the condition of the existing installation was assessed as part of the survey, an Electrical Installation Condition Report may also be required by the client or their insurer.

Lux level verification involves measured readings at floor level and at the rack face, compared against the designed targets. Use a calibrated lux meter and record readings by zone on a site plan. If a zone falls short, the cause is almost always luminaire spacing or an obstructed beam rather than a product failure. Having the photometric design on site during commissioning makes the diagnosis faster.

Controls commissioning requires each PIR to be set on site for the actual space - sensitivity, time delay, and background level. DALI systems need each luminaire addressed, grouped into zones, and tested from the control interface. Document the final configuration clearly: which DALI address, which group, which scene. The client or their maintenance contractor will need this information when a luminaire needs replacing in three years. A commissioning report that does not include the addressing scheme is a handover failure.

The complete handover pack for a commercial industrial lighting project should include:

• Electrical Installation Certificate
• Luminaire schedule with product codes, quantities, and wattage by zone
• As-installed drawings showing luminaire positions and circuit layout
• Emergency lighting test records and recommended annual test schedule
• Controls commissioning report with DALI address map or PIR settings log
• Manufacturer data sheets and warranties for luminaires and control gear
• Maintenance guidance including emergency battery check frequency

Most commercial and industrial operations switching from fluorescent or high-intensity discharge fixtures to LED see energy cost reductions of 40-70% on their lighting bill. With LED lifespan running 30,000-50,000 hours compared to the typical 10,000 hours of a fluorescent tube, the combination of energy savings and lower maintenance frequency typically produces payback within two to five years - faster on high-usage sites and slower on part-time operations. Communicating this to the client as part of the handover, with projected figures based on their actual usage hours, reinforces the value of the project and reduces the chance of the cost being questioned six months later.

Running the Job Through Zigaflow

Managing a commercial industrial lighting project means tracking quotes, purchase orders, installation phases, and handover documents across a job that might run for three or four weeks on a live site. Zigaflow's quote management lets you build out the luminaire schedule, access costs, controls, and commissioning as separate lines from the start, so nothing gets absorbed into a day rate and every scope element is visible when the invoice is raised. For electrical contractors running multiple industrial lighting projects in parallel, having job records, supplier POs, and test documentation in one place is what keeps the final account clean.

For a step-by-step guide to retail lighting projects with a shorter programme and lower ceiling heights, see how to quote and run a retail shop lighting installation. For the wider lighting and electrical industry, Zigaflow for lighting and electrical contractors covers how the platform supports project and quote management across the vertical.

Commercial industrial lighting contracts produce margin problems when the quote misses access costs, underestimates controls commissioning time, or leaves emergency lighting compliance to be resolved on site. Running a clear process from survey to handover - with lux targets confirmed before specification, access costs itemised before the quote is submitted, and commissioning treated as a separate programme activity - is what separates contractors who make money on industrial lighting work from those who deliver it at cost. The documentation is not just a compliance requirement: a complete handover pack with commissioning records is also what gets the final invoice paid without a query.

Sources

• Commercial LED Lighting: Costs, Savings and What UK Businesses Need to KnowRenewable Energy Hub · accessed 2026-09-01
• A guide to warehouse lightingAnsell Lighting · accessed 2026-09-01
• Commercial LED Lighting Installation - Offices, Warehouses & RetailMD Govier Electrical Engineering · accessed 2026-09-01

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