Commercial Lighting Upgrade Checklist: 7 Steps Before You Sign the PO

Who this checklist is for (and who it isn't)

If you're managing a lighting upgrade for an office, clinic, warehouse, or multi-tenant building—and you're the person who has to reconcile the invoice with finance—this is for you. I'm not an electrician. I'm the admin who coordinates between the contractor, the facilities team, and accounts payable. This is the sequence I use before any lighting purchase gets approved.

Seven steps. No theory. Each one has a checkpoint you can actually verify.

One caveat up front: this works for standard commercial spaces with predictable occupancy. If you're dealing with a historic building or a 24/7 manufacturing floor, some of these steps need a licensed engineer, not me.

Step 1: Audit the panel and circuit capacity before you fall in love with a fixture

This is the step most people skip (I did, once, and it cost us a $1,800 restocking fee on fixtures we couldn't power). Before you look at a single catalog, get a photo of the existing panel schedule and the breaker labels.

What you're checking:

• How many open breaker slots you actually have
• Whether the existing lighting circuits are 120V or 277V (commercial spaces often run 277V, and residential-grade fixtures won't work)
• Whether the panel has room for the added load—or whether you need a retrofit panel approach

An Eaton retrofit panel is worth pricing out if your existing panel is full but the box has physical space. It lets you replace the interior without tearing out the enclosure, which keeps the downtime to a few hours instead of a full day. In our 2023 office refresh, the retrofit option came in around 40% cheaper than a full panel swap—though I should note that was for a fairly standard 200A setup, so your mileage may vary.

Checkpoint: You have a dated photo of the panel schedule and a written confirmation from the electrician that the new load fits.

Step 2: Match switches and dimmers to the fixture, not the other way around

Switch compatibility is a red flag area. An Eaton light switch might be the default in your building, but that doesn't mean it'll play nice with every LED driver. The failure mode is annoying: the lights work, but they buzz, flicker at low dim, or drop out below 20%.

What I do now: pull the spec sheet for the exact fixture model and check the driver's dimming protocol (0-10V, TRIAC, DALI, etc.). Then confirm the switch supports it. If the switch is already installed and you're not replacing it, that's your constraint—not the fixture's marketing page.

And if you're adding smart fixtures—we used Hue spotlights in a reception area for accent lighting—check whether the control app and the wall switch can coexist. In our case, the Hue bulbs needed to stay powered on at all times, which meant the wall switch had to be taped over. Not a deal-breaker, but the cleaning crew kept flipping it off until we put a cover on it.

Checkpoint: You have written confirmation (email is fine) from the vendor that the switch and driver are compatible.

Step 3: Separate "must-work" lighting from "looks-good" lighting

This sounds obvious, but the budgets blur fast. Functional lighting—task lighting, egress paths, emergency fixtures—needs to be specified for output and reliability. Decorative lighting is a different purchase with different criteria.

Say you're putting a marshmallow chandelier in the lobby or a breakout space. It's a statement piece, and it's fine for that. But before ordering, ask three questions:

• How do you change the bulbs? (Some decorative fixtures require partial disassembly.)
• What's the cleaning procedure? (Fabric-wrapped or matte-white shades show dust fast.)
• Does the ceiling have the structural capacity for the fixture weight plus a safety cable?

We bought a similar fixture for a client lounge in 2022. Gorgeous. But the bulb replacement required removing six screws and a trim ring, and the maintenance team charged us a minimum call-out every time. That was a $90 fixture that cost $200 a year to maintain.

Checkpoint: Decorative fixtures have a documented bulb-replacement procedure and a named person responsible for it.

Step 4: Plan LED strip mounting before you buy adhesive

This is where how to hide LED strip lights on a wall becomes a procurement question, not just an installation one. The strips themselves are cheap. The labor and rework are not.

Two approaches that actually hold up in commercial spaces:

1. Aluminum channel with a diffuser. Mount the channel to the wall or ceiling cove first, then press the strip into it. The channel handles heat and gives you a clean line. Cost is higher, but the failure rate is much lower.
2. Recessed cove or shadow gap. If you're already opening the wall for other work, run the strip inside a recessed pocket. The light bounces off the back surface and you never see the diodes.

The adhesive backing on most consumer strips fails within 6-12 months in a commercial environment—heat, dust, and cleaning chemicals all work against it. I've seen strips peel off a wall and land on someone's desk. Not a fun email to write.

Checkpoint: The install plan specifies mounting hardware (channel, clips, or recess), not just "adhesive backing." And the driver location is accessible for replacement.

Step 5: Verify emergency lighting and egress requirements against current code

Emergency lighting is the one category where I don't improvise. The relevant baseline in the U.S. is NFPA 101 (Life Safety Code) and NEC Article 700, with UL 924 covering the equipment itself. Your local AHJ (authority having jurisdiction) may layer on additional requirements.

What I confirm in writing before the PO goes out:

• The emergency fixtures are UL 924 listed
• Battery backup runtime meets the code-required duration (often 90 minutes, but verify locally)
• The egress path illumination is tested and documented after install

According to OSHA 1910.37, exit routes must be adequately lit and emergency lighting maintained—but the specifics come from your local code official. I always ask the contractor for the inspection sign-off, not just the installation invoice.

Checkpoint: You have a signed inspection or test report, not a verbal "it's fine."

Step 6: Qualify the vendor's invoicing before you commit to the order

This is the step that saved me from a $2,400 expense rejection. In 2021, I ordered fixtures from a new distributor because the price was 15% below our regular supplier. The fixtures arrived fine. The invoice was a handwritten receipt with no PO number. Finance rejected the expense report, and I had to eat the cost out of the department budget while we sorted it out.

Now I ask two questions before any first order:

• Can you issue a proper invoice with our PO number and itemized line items?
• Do you accept our standard payment terms, or is this prepay-only?

If the answer to either is vague, that's a red flag. The efficiency gain from a lower price disappears the moment you're chasing paperwork for three weeks.

Checkpoint: You have a sample invoice or a written confirmation of invoicing capability before the PO is issued.

Step 7: Write an acceptance checklist that names who fixes what

The job isn't done when the lights come on. It's done when you've walked the space with the contractor and confirmed the punch list in writing.

My standard acceptance items:

• All fixtures operating at full output, no flicker at low dim
• Emergency and exit lights tested, with the test date logged
• LED strips secured—physically tug on a few sections
• Decorative fixtures level and secure, with the trim rings seated
• Spare lamps or drivers handed over (ask for at least 5% spares)
• As-built panel schedule updated with the new circuit labels

And the part that gets missed: name the warranty contact and the response time in the sign-off document. "Call the manufacturer" is not an acceptance criterion. "Contact [name] at [number], response within 2 business days" is.

Checkpoint: Signed punch list with a named warranty contact and a response-time commitment.

Common mistakes I've made (so you don't have to)

Ordering fixtures before checking voltage. We bought 120V fixtures for a 277V circuit. They didn't work, and the restocking fee was 20%.

Assuming the contractor handles code compliance. They handle installation. You own the inspection sign-off. Get it in writing.

Skipping the spare-parts conversation. LED fixtures last a long time, but drivers fail. If you don't have a spare driver on the shelf, a single failure can leave a section dark for a week while you wait on a replacement.

Treating decorative lighting like functional lighting. A marshmallow chandelier or a Hue spotlight setup needs a maintenance plan, not just an install plan. If no one owns the upkeep, it becomes a dust collector with a warranty.

Bottom line: the cheapest quote is rarely the lowest total cost once you factor in rework, downtime, and the hours you spend chasing paperwork. The checklist above takes about two hours to run through. It has saved me far more than that in avoided mistakes.

Prices and lead times referenced are based on distributor quotes from early 2025; verify current pricing and availability before ordering.