Before you compare any cold room lighting, write down what the room will do to each fixture. Record the temperature where each light will hang, the moisture, condensation, and cleaning it will face, the tasks and exit routes it must light, and the mounting, power, and control setup. Then check each item against current documents for the exact model and configuration you are considering.
A candidate is ready to compare only when a specific document covers each recorded condition. If a detail is missing, vague, or written for a different model, ask for more evidence or get a qualified review. Never count that detail as a pass.
Record the Cold Room's Actual Conditions and Tasks
Build this site record before you evaluate fixtures like an enclosed vapor tight fixture. Use a separate entry for each fixture location with different temperature or exposure conditions. Write "unknown" wherever you lack a confirmed fact, so a gap never looks like a match.
- Temperature at the fixture location. Record the expected low and high temperatures where each fixture will sit. A room label like "refrigerated" or "freezer" is not enough. A freezer bay and the dock next to it may need separate entries. Our guide to LED operating temperature explains how heat and cold change LED performance.
- Moisture, condensation, and cleaning. Describe what actually reaches the fixture, such as condensation near doors or washdown during cleaning. NEMA explains that what an IP degree rating covers is limited to the entry of solid objects and water. An IP number alone does not show that your condensation or cleaning exposure is handled. Mark that coverage unresolved until a document addresses it. If impacts are also a risk at that spot, our guide to vapor tight fixture ratings explains how IP ratings differ from IK impact ratings.
- Tasks and where they happen. Name the work in each area, such as storage or picking. One warehouse lighting guide describes judging light at the task point and plane, horizontal or vertical, where the work is done. The same guide notes that vertical-plane light matters when items are stored on stacks. Write down which plane each task uses.
- Exit routes. List these apart from work areas. OSHA's exit-route requirement says each exit route must be lighted well enough for an employee with normal vision to see along it. That rule covers exit routes. It does not set a light level for storage or picking.
- Mounting. Record where and how each fixture will mount and how crews will reach it for service. Pull this from facility records or the project plan.
- Electrical supply and controls. Record the supply voltage and the control plan, such as switches, sensors, or dimming. Get these from facility records or the project's electrical professional. They are inputs to compare, not wiring decisions.
Match Those Conditions to the Exact Fixture Documentation
Compare each line of your site record with a specific statement in a current document for the exact candidate, whether evaluating high-bay luminaires such as a commercial linear high bay or low-profile units. A broad product description or a rating that isn't tied to a configuration does not count as a match.
Check the Exact Model and Configuration
Start by confirming that every document names the same model and configuration you would order. Then give each site condition a status of matched, unclear, or missing:
- Identifier. Match the model number and every selectable option to the datasheet, manual, or label you are reading. Specs from a sibling variant do not transfer.
- Environmental limits. Find the stated operating temperature range and any location or moisture statement for that configuration. Compare them with the bounds you recorded for each location.
- Ingress rating. Given the limits of an IP degree rating, treat it as ingress evidence only. For condensation or cleaning exposure the rating doesn't cover, request exact-configuration documentation.
- Mounting. Confirm that the installation document lists a mounting method that fits the position you recorded.
- Electrical and controls. Compare the listed input voltage and control type with your recorded supply and control plan. Leave circuit calculations and connections to the project's electrician.
- Task lighting evidence. DOE explains what an LM-79 report measures: electrical data, lumen output, light distribution, and color, all under specified test conditions. It does not cover lifetime ratings or LED case temperature. It also can't show that a fixture suits a cold room. Confirm that the report names your configuration. Then read an IES file for that same configuration to judge light at each task's point and plane, including rack faces where stock is stacked.
When two records disagree, or a record doesn't name your variant, don't pick the more favorable value. Request a current document or written clarification instead. To build your file, you can download product specs for our fixtures and confirm that each sheet names the exact variant. If you are screening options from our indoor LED lighting range, run each exact listing through this same crosswalk.
Choose: Proceed, Verify, or Seek Confirmation
Once every line has a status, the pattern tells you the next step for that candidate.
| Status | What you see | Next action |
|---|---|---|
| Proceed to compare | Every recorded condition has a matching statement for the exact configuration | Compare candidates against your project criteria |
| Verify first | A record is missing, vague, conflicting, or tied to another model or variant | Request the current record or written clarification |
| Seek confirmation | The open question is electrical design, code applicability, or location classification | Take it to the qualified project professional or authority |
One unresolved line keeps a candidate in Verify first, even if everything else matches. "Proceed" means the paperwork lines up. It is not a code approval.
This review is a document check only. It does not approve wiring, live testing, circuit design, code compliance, or hazardous-location classification. The responsible qualified professional or authority makes those calls. If an area may be a classified location, check only that the exact label and documents state a classification, then have that question reviewed. Don't decide the classification or the fixture's fit yourself.
What Changes for a New Installation vs. a Replacement
A new installation builds the site record from the project plan, while a replacement rebuilds it from the room as it is today. In both cases, the old or planned fixture is background, not proof that a new candidate fits.
| Project path | What to confirm | Decision consequence |
|---|---|---|
| New installation | Planned temperatures, exposure, tasks, mounting, supply, and control plan | Screen candidates only after these inputs are set |
| Replacement | Current room conditions plus existing mounting, supply, controls, and tasks | Compare the proposed configuration to today's conditions, not the old fixture |
The DOE Seattle retrofit account shows that a replacement can change more than the fixtures. At Lineage's Seattle cold-storage facility, 636 fluorescent fixtures were replaced with 585 LED fixtures. In the freezer and dock area, adjustable sensors replaced standard on/off switches and dim the lighting to 10%. The project account says less heat from the lights meant the refrigeration system did not need to work as hard.
Those results belong to that one project. If your replacement adds sensors or dimming, add the control type to your site record. Then check it against each candidate's documents. When you move to quotes, it helps to scope lighting replacements so that base work, alternates, and exclusions stay separate across suppliers.
FAQs
What should I do when two documents for the same fixture disagree?
Treat that point as unresolved. Note the model identifier and revision shown on each document. Then ask the manufacturer to confirm in writing which one applies to the configuration you would order. Don't average the values or rely on whichever one looks better.
Does OSHA set a light level for cold room work areas?
Not through the exit-route rule. OSHA 1910.37 requires exit routes to be lighted well enough for an employee with normal vision to see along them. It does not set a target for storage or picking areas. State rules, local rules, and project specifications can add their own requirements. OSHA's warehousing standards overview is a starting point for the federal general-industry standards that apply to warehouses.
Can a freezer and a nearby refrigerated room share one fixture spec?
They can only if the candidate's documents cover the recorded conditions at both locations. Keep separate site entries for each area. The same fixture can be ready to compare for one area and still need verification for the other.
Can a photometric file show that a fixture will work in the cold?
No. IES files and LM-79 reports describe light output and distribution under their stated test conditions. Cold-room fit depends on the exact configuration's stated operating temperature range and its moisture or location statements. Check those separately.
