Before you replace commercial fixtures, make one record of the existing commercial lighting controls for each zone. List the fixtures the zone serves, the exact model numbers on its switches, sensors, timers, and controllers, and how the lights actually behave. Then mark every entry as documented, observed, or unknown.
Next, compare the documented entries with the exact configuration of the fixture you plan to buy. Keep selecting for a zone only when current documents support the control relationship and no mismatch is left open. If something is missing or conflicts, hold that zone until you have exact manufacturer documents or a qualified review.
Create a Zone-by-Zone Controls Record
Give each zone its own entry because areas on the same floor can have different fixtures, sensors, schedules, or shared controls. Keep this record strictly for documentation without opening panels or changing wiring. Circuit design, installation, and code compliance belong to a licensed electrician, a lighting professional, or your local authority.
Copy these fields for each zone:
- Zone ID and location: a name that matches your floor plan, such as "Warehouse aisle 3" or "2nd floor open office, east."
- Fixtures served: fixture type, count, and any fixture or driver model number you can read on a visible label.
- Control devices: each switch, sensor, timer, or controller on the zone, with the exact model or catalog number shown on its face or cover plate.
- Observed operation: what you saw happen, such as on/off only, dimming, turning on when someone enters, dimming as daylight rises, or following a schedule.
- Schedule and grouping: known on/off times, plus whether the zone shares a controller, sensor, or network with other zones.
- Source and date: where each entry came from and when you recorded it.
- Status: documented, observed, or unknown.
Federal buying guidance names the control strategies to watch for. DOE FEMP guidance lists occupancy sensors, task tuning, and dimming when daylight is present (where applicable) as strategies to consider. When you see one of these in a zone, record the behavior. A fixture that dims as sunlight rises tells you the zone uses daylight dimming. It does not tell you the control signal, the voltage, or whether a new fixture will work with it.
Here is an illustrative entry. Zone W3 has 12 high bays, a wall switch, and a ceiling sensor whose model number is printed on its face (visible label). The lights turn on when a forklift enters (observed). A 10 p.m. shutoff is suspected but unconfirmed (unknown until someone pulls the building schedule).
For high bay zones with occupancy sensors, our guide to UFO vs. linear sensor setups covers dead zones and zone sealing worth noting. If you are also capturing photos, measurements, and access notes, add this controls record to your broader lighting survey record.
Find the Documents That Confirm System Details
A walk-through shows what the equipment is called and how it behaves. Current manufacturer documents show what it is rated to do. Build an evidence packet that pairs each exact model number with the file that confirms it.
- Installed controls: the current manual or spec sheet for each switch, sensor, timer, and controller. Match it to the exact model number and any revision printed on the device.
- Existing fixtures and drivers: spec sheets for the installed fixture or driver model, so you know what the controls are driving today.
- Networked or central systems: the controller's documents, plus any schedule or group export from the building system that shows which zones it runs.
- Proposed fixture: the spec sheet for the exact configuration you plan to order, not a series overview. For our fixtures, current spec sheets are on our specification download page.
- Entry mapping: beside each record entry, note the file name and the page or section that supports it. Change an entry from observed to documented only when a file confirms it.
Sometimes two sources disagree. A device label might show one model number while an as-built drawing shows another. Keep both, and mark the entry unknown. If you pick one by assumption, an open question turns into a hidden risk. Labels and observed schedules still matter, because they tell you which document to track down next.
On a larger project, the DOE's lighting controls selection resources include a guide for organizing control objectives, system capabilities, networking options, and documentation needs. Use it to structure the review. The pairing decision itself should still rest on the exact equipment documents.
Compare the Proposed Fixture and Choose the Next Step
Compare only the documented details that matter for each zone, such as control signals, dimming, voltage, load limits, and network dependencies. A valid match requires verified documents on both sides rather than similar labels or observed behavior alone. Broad claims about LED flexibility cannot substitute for confirmed equipment specifications.
Start with control type. A DOE-hosted workshop presentation says that, for the control types it covers, the LED product and control must use the same control type to be compatible. The same presentation describes a museum project where most dimming circuits had to be reevaluated for compatibility and load after the lighting products changed. So a zone that dimmed well with the old fixtures still needs a documented check with the new ones.
Treat this table as a cautious planning gate for existing commercial lighting controls, not a code rule:
| Documented condition | Next action |
|---|---|
| Exact installed and proposed models identified; current documents support the control relationship | Continue selection for this zone |
| A relevant detail is missing, or sources conflict | Hold this zone; get exact manufacturer documents or qualified review |
| Documents show a mismatch, such as different control types | Do not release this fixture choice; find a documented alternative or get qualified review |
Run the gate one zone at a time. A held zone does not have to stop the whole project. Zones with a documented match can move ahead while the held zone waits for its missing spec sheet or review. A "continue" result only clears fixture selection. Once every zone has a result, carry those results into your order release checks before you commit to a bulk order.
FAQs
What if the building has no control documentation at all?
Start with the zone record anyway. Visible model numbers are often enough to request current manuals or spec sheets from each manufacturer. Also check the original installer's closeout files and the facility's maintenance records. Until a file confirms an entry, leave it marked unknown and hold the zones that depend on it.
Should I record zones that are not part of this replacement phase?
Yes, if they share a controller, sensor, schedule, or network with a zone you are replacing. Write down that shared relationship in both zones so the review looks at the whole group, not just the fixtures in the current phase. You can skip zones that are fully standalone until their phase comes up.
Do energy code rules affect which controls the new fixtures need?
They may. Requirements depend on your jurisdiction and project scope, so confirm them with your local authority or a qualified designer. For the occupancy, daylight, and dimming topics that audits under ASHRAE 90.1, IECC, and Title 24 can cover, see our energy code controls checklist.
Who should resolve a zone that is on hold?
It depends on the open question. For whether a specific control and fixture can pair, go to the manufacturers of the installed control and the proposed fixture. For circuits, wiring, or load, go to a licensed electrician. For code questions, go to the local authority having jurisdiction. Put the answer and its source into the record before you release that zone.
