Mezzanine lighting: plan above and below the deck

Mezzanine lighting needs a task-based plan for both levels: the work below the deck, the work above it and the routes connecting them. Start with what people must see, not a fixture count. Record the visual tasks, operating conditions and agreed acceptance criteria before selecting the layout.

This guide covers normal working illumination and its verification. The height-clearance guide covers the vertical space, while the floor-plan guide organizes the physical layout. Emergency lighting and power-loss operation require a separate design review; they are not resolved by the normal-lighting checks below.

All three images are AI-generated concept illustrations, not project photographs, photometric calculations or measured results. This Cogan-affiliated editorial guide claims no named technical review. Have the responsible lighting and electrical professionals establish the applicable requirements and approve the actual installation.

What should the lighting brief describe first?

List the visual task and where it happens. Reading a label on a vertical shelf face is different from examining an item on a horizontal bench. Include people’s normal viewing positions, screens, storage arrangements and the periods when each area is used.

CCOHS guidance distinguishes general, localized-general and local task lighting. It also explains that a luminaire controls light distribution and that one fixture type does not suit every situation. Use those distinctions to discuss the job each part of the installation must perform.

Prepare a marked plan and a brief like this:

Keep proposed activities separate from confirmed ones. If a mezzanine may later become a warehouse office, record that as a future scenario rather than assuming its present storage-lighting design already covers the new use.

Is there one required lux level for every mezzanine?

No single value in this guide establishes suitability for every task and jurisdiction. Identify the governing rules and relevant design recommendations, then write the selected criterion beside the task and measurement plane. A number without that context is difficult to specify or verify.

The CCOHS survey guidance describes illuminance as light falling on a surface and explains that needs depend on the task, surrounding surfaces, area and individual vision. Its recommended ranges are guidance; they are not automatically the legal requirement for every Canadian warehouse.

In the US, 29 CFR 1926.56 is a construction standard. Its table includes warehouses within that context. Do not copy that entry into an operating-facility specification as if it were a universal task-lighting target. Have the project team establish which building, energy, electrical and workplace requirements apply to the proposed use.

Ask the designer to identify the source and edition behind each criterion. Include the intended maintenance condition and how the installation will be assessed. This gives bidders a common scope without implying that a generic online recommendation approves the design.

How should fixtures above and below the deck be coordinated?

Review the lighting layout against the complete proposed section and operating plan. Do not rely on the original open-bay arrangement after introducing a solid floor, framing and new work areas. Show the upper and lower fixtures, their mounting locations and the objects around them.

For the lower level, place workstations and storage on the drawing before assessing the proposed light distribution. For the upper level, include shelves and the intended stock arrangement rather than evaluating only an empty deck. Mark the actual task surfaces that must be reviewed.

Coordinate fixture positions and maintenance access with the structural and service designers. The sprinkler guide and manufacturing guide cover other interfaces that may share this space. A lighting sketch should expose conflicts for review, not quietly assume a pipe, machine or structural member can be moved.

Include fixture specifications and the proposed calculation or assessment method with the project planning checklist. Ask for the same scope in competing proposals: fixtures, controls, electrical work, verification and maintenance access. Otherwise, similar fixture counts can conceal different deliverables.

What should you check besides brightness?

Check whether people can see the task comfortably in their normal positions. A high reading at one point does not resolve troublesome reflections, shadows, poor distribution or flicker. Include worker observations and the actual workstation arrangement in the review.

The CCOHS lighting checklist addresses those conditions alongside adequate task lighting. It includes monitor positioning, local lighting, steady illumination, maintenance and cleaning. Its purpose is to identify issues for follow-up; a completed checklist may still need a more detailed survey.

Review the workstation with the objects normally used there. Record the viewing direction, screen position and any troublesome reflection rather than writing only “too bright.” If changes are proposed, repeat the relevant observations after adjustment. Keep the assessment tied to the task instead of assuming that adding another fixture is always the answer.

How should occupancy and daylight controls be tested?

Define the expected behavior before commissioning the controls. Identify each zone, when it should operate, how people enter and work there, and what happens when the zone becomes vacant. Include relevant manual controls and the separate life-safety requirements in the coordination review.

The US Department of Energy’s occupancy-sensor guide emphasizes choosing suitable spaces and sensors, selecting mounting position, setting parameters and calibrating operation. It distinguishes automatic-on occupancy strategies from manual-on vacancy strategies. Its published examples do not establish a savings percentage for your mezzanine.

Make a test list using the intended activities: entering a picking aisle, working at a bench, leaving a zone and returning after the specified delay. Record the observed response and any missed detection or unwanted switching. Test the agreed daylight-related behavior under relevant conditions rather than accepting a control solely because its indicator light turns on.

Retain settings and responsibilities in the handover record. If shelving, workstation positions or operating patterns change, identify which checks must be repeated. The inspection-correction guide provides a way to track unresolved items through review and closure.

A transparent energy-use example

Energy estimates should expose their inputs. EIA explains that a kilowatt is 1,000 watts and energy use over time is measured in kilowatt-hours. For a constant input power, multiply kilowatts by operating hours.

Suppose 12 fixtures each draw 40 watts for 2,000 hours. These are invented arithmetic inputs, not product specifications or measured operating hours:

12 × 40 × 2,000 ÷ 1,000 = 960 kWh.

That result covers the stated fixture load only. It does not demonstrate sufficient lighting, include separately powered controls or establish bill savings. For dimmed or variable operation, use the applicable power and duration for each operating state or measured consumption. Keep installation, maintenance and energy assumptions in the ownership-cost model without treating a forecast as an observed result.

The lighting handover worksheet

Agree the verification method with the responsible reviewer. Canada’s Labour Program measurement guidance, written for the federal occupational-health-and-safety regulations, illustrates why task location, representative measurement points and avoiding accidental shading of the sensor matter. Its procedure should not be presented as a universal provincial or US test method.

Include the furniture and stock condition, daylight conditions and control state with the readings so another reviewer understands what was tested. The commissioning guide explains the wider evidence handover. A lighting check is one part of that record, not approval of the whole mezzanine.

What to read next

• Mezzanine height and clearance — coordinate fixtures with the vertical section.
• Mezzanine offices — review the occupied work-area brief.
• Mezzanine total cost of ownership — document operating and maintenance assumptions.