To assess warehouse cross-aisle lighting, go one point at a time. Map every cross-aisle route, intersection, turning point, aisle end, and recurring work spot, then record how each one is used. You end up with a location register that shows which points you checked against a criterion that applies to them and which points are still open.
Federal OSHA gives you two narrow checks here. One covers exit routes and the other covers powered industrial trucks. Every other point stays open until a project criterion or a qualified photometric review settles it. A first-pass register does not approve the design or confirm code compliance.
Start with a location register, not an aisle-wide assumption
The review should produce one entry for every distinct location, not one note for each aisle. Use the general warehouse lighting layout, an on-site walkthrough, or both to build it:
- Mark each cross-aisle route as its own segment with a reusable ID, such as CA-1 or CA-2.
- Give intersections and turning points separate IDs, such as INT-3 or TURN-2, even when they sit on the same cross-aisle.
- Mark each aisle end (END-12, for example). If one end is only a route endpoint and another has picking or staging, give them separate entries.
- Add recurring work points such as picking faces, staging lanes, or other spots where people do the same task again and again.
- Fill in the basics for each ID: planned or existing, and the exact route segment or work point it covers.
Give every entry one of three statuses. Assessed means you checked the point against a named, applicable criterion and wrote down that criterion. Unresolved means the task criterion, a measurement, or the layout evidence is missing. Not yet assessed means nobody has reviewed the point. These labels are a practical screening tool, not a regulatory category. They stop a quick look from turning into an implied pass. A note that says "cross-aisle looks fine" tells you nothing about the intersection at its far end.
Tag each point with its activity and visual task
What a location is used for changes which check applies to it. Tag each ID with its real use and visual task before you apply any criterion.
Separate travel, turning, and crossing
Keep the tags short and base them only on what you have seen or been told:
- Movement type: through travel, turning, merging, or crossing.
- Users: pedestrians, powered industrial trucks, or both. If you don't know yet, write "unknown" rather than guessing.
- Visual task: what someone at that point has to see, such as oncoming traffic at a crossing or the route ahead after a turn.
A through-travel segment and the turn at its end can call for different reviews. That is why they get separate IDs.
Record endpoint work and layout conditions
Aisle ends need an extra note because the same spot can be a route endpoint or a workstation. Record these details for each ID:
- Endpoint use: travel only, or also picking, staging, or other recurring work. If it's a work point, name the task.
- Layout details: rack and equipment placement, signs, and anything that may block light or a sightline.
- Luminaire details, when available: position, orientation, mounting type, and height. Also note the fixture style (for example, round or linear high bay fixtures) and any add-on optics such as aisle optic lenses.
- Observation conditions for existing areas: time of day, whether any fixtures were off or dimmed, and where readings were taken. Measurement position and shadows can change the results. If aisle ends use occupancy controls, record what state they were in during the walk. Aisle-end sensor trigger setup explains how those triggers behave.
These notes feed the choice of criterion and any later technical review. On their own, they don't show that a point passes or fails.
Apply only location-matched checks
The supplied federal rules support just two checks at these locations: exit-route visibility and a condition for powered industrial trucks. Any other point needs a named project criterion before you can mark it assessed.
Under OSHA's exit-route visibility requirements, each exit route must be lit well enough for an employee with normal vision to see along it. The line of sight to an exit sign must also stay clearly visible at all times. The same section requires each exit sign to be lit to a surface value of at least five foot-candles (54 lux). That number applies to the sign surface only, not to the aisle floor or the route.
The powered industrial truck lighting rule says that where general lighting is below 2 lumens per square foot, the truck must have auxiliary directional lighting. This is a rule about truck equipment. It is not a lighting target for a cross-aisle, an aisle end, or a task area.
| Location or use | Supported check | Keep unresolved when |
|---|---|---|
| Exit-route segment, intersection, or aisle end | Visibility along route; exit-sign sightline clear | Not walked, sightline blocked, or sign unverified |
| Truck route, turn, or crossing | Truck auxiliary lighting if general lighting is below 2 lm/ft² | General light level or truck lighting unknown |
| Other circulation point | Named project criterion and its source | No criterion established |
| Recurring work point | Task matched to a project criterion | Task or criterion missing |
Federal rules may not be the whole picture. Check whether your facility falls under an OSHA-approved State Plan and what that plan currently requires. Then identify local building or fire requirements separately with the local authority. If a point has no criterion from any of these sources, mark it unresolved.
Hand off unresolved points for technical review
Send each unresolved point as its own record so the reviewer can evaluate that specific spot instead of giving a warehouse-wide opinion. If visibility remains unresolved on a route, at an intersection, or near egress, do not mark that point cleared for signoff. Instead, send its record for qualified technical review.
Each handoff record should include:
- Location ID and type: for example INT-3, plus whether it is planned or existing.
- Use and visual task: the movement, user, and task tags from the register.
- Observed or planned condition: layout notes, luminaire details, and the observation or measurement conditions.
- What is missing: the criterion, a measurement, layout drawings, or jurisdiction information.
- Requested next step: a spot measurement, a photometric simulation, a jurisdictional check, or another qualified review, with a named reviewer.
Illustrative example: INT-3 is an existing crossing where pedestrians and forklifts meet. A rack end sits between the north corner and the nearest fixture, and no project criterion has been set. The request is a photometric simulation of that corner against the criterion the reviewer confirms.
To prepare inputs, the DOE's FEMP assessment guide explains why sensor angle, location, height, and shadows can affect light readings. It also lists what a simulation needs: space dimensions and each luminaire's position, orientation, mounting type, and height. It is a general indoor guide, so use it to gather inputs, not as a warehouse pass/fail standard. For specified fixtures, documenting lighting with IES files shows how photometric files support the record. For a planned layout, high-bay layout planning covers uniformity, glare, and shadows. When a point needs a simulation, you can send its register entries through our lighting design request.
FAQs
Is there one foot-candle target for warehouse cross-aisle lighting?
Not in the federal rules this review uses. OSHA's five-foot-candle value applies to exit-sign surfaces, and its 2 lumens-per-square-foot figure decides when a powered truck needs its own directional lighting. To judge ordinary cross-aisles, turns, or aisle ends, get the project criterion from your designer or reviewer and write down its source.
Does a federal OSHA check settle requirements in my state?
Not always. Some states run OSHA-approved State Plans, which must be at least as effective as federal OSHA and may add their own rules. Local building and fire codes are a separate layer. Confirm which authorities cover your facility before you treat any point as fully assessed.
Can I complete the review from a lighting plan alone?
A plan is enough to map IDs and tag uses on a new layout. For an existing area, racks, signs, stored goods, and equipment can differ from the drawings. Leave those points unresolved until someone walks them, measures them, or simulates them with current layout data.
When should a point in the register be reopened?
Reopen a point when something changes what people see or do there. Examples include moved racks, a new staging lane at an aisle end, relocated signs, changed truck routes, or new or re-aimed fixtures. Give the changed point a new status instead of keeping its old one.
