The 7-Point Commercial Lighting Order Checklist I Built After $11,400 in Mistakes

I've been handling commercial lighting orders for about eight years now—distributor side, mostly. Downlights, high bays, area and flood lights, emergency units. I've personally approved orders that went wrong in ways that cost my team roughly $11,400 across three years, and I maintain the checklist below so nobody on my team repeats them.

It's seven steps. It takes about 40 minutes on a typical project. If you're placing your first big commercial LED order—or switching fixture manufacturers and not sure what to double-check—this is the list I'd want you to have.

Quick caveat up front: my experience is based on about 150 mid-to-large orders, mostly through Lithonia Lighting and two other manufacturers. If you're doing specialty theatrical or marine lighting, some of this won't map cleanly.

Step 1: Photograph the actual space, not the old spec sheet

In my first year (2019), I replaced 60 recessed downlights in a hotel corridor using the original 2011 spec sheet on file. What I didn't know: the ceiling had been re-dropped in 2016 and the plenum depth had shrunk by 3 inches. Forty-two of the new fixtures physically did not fit. That's $3,200 of fixtures plus a truck roll and a very patient contractor.

What to do:

1. Get a photo of the actual fixture back, from below, with a tape measure in frame.
2. Measure plenum depth at three points, not one. Ceilings are rarely flat.
3. Check for existing junction box size—some retrofit kits assume a 4" box, some need a 4" octagon.

Step 2: Verify the certification stamps before anything else

For commercial installs in most North American jurisdictions you're going to need UL listing, and in California or on many utility rebate programs, DLC listing (and often Title 24 compliance). I once ordered a pallet of area lights based on a spec sheet that said "DLC listed" in the marketing copy—it was actually DLC pending. The rebate $2,100 we'd promised the end customer didn't exist. We ate the difference.

Don't trust the datasheet alone. Look up the model number on the DLC Qualified Products List directly. For emergency fixtures, confirm UL 924. For flood lights in wet locations, confirm the IP rating on the fixture label, not the family listing.

If the spec sheet uses the word "pending," "approved for," or "designed to meet," assume it doesn't have the stamp yet.

Step 3: Run the emergency light load calculation yourself

This is the one most people skim. The Lithonia emergency units we order are rated for a specific wattage load and a runtime—typically 90 minutes at a listed output. If the connected load exceeds the rating, you fail the inspection. Full stop.

The mistake I made in September 2022: I approved 18 emergency downlights on a circuit assuming the contractor would do the load calc. He didn't. The inspector flagged it, we sourced a remote-head setup in a hurry, the change order was $890 and pushed the C of O by four days.

Do the math yourself. Watts per head × number of heads, compared against the unit's rated load. If it comes within 10% of the limit, either downsize the head count or move to a remote-capable model with a bigger battery.

Step 4: For flood lights, check beam angle, not just lumens

"1,000W equivalent, 13,000 lumens" tells you nothing about whether the pole light will actually cover the loading dock. Beam angle tells you that. If I remember correctly, a Type III distribution is what you want for perimeter lighting on a rectangular lot; Type V is for center-mount poles.

I've seen three projects where the lumens were fine and the coverage was still wrong. To be fair, this is the one where specifiers usually need to be involved—but if you're a distributor taking the order, ask the customer for the pole layout and distance before you commit to a count.

Step 5: Confirm the control protocol matches the existing system

0-10V, DALI, phase-cut, or proprietary. Manufacturers like Lithonia cover most of these, but not every SKU in every family. I learned this one in 2021 on a small order where we spec'd a fixture with an integrated sensor that spoke a proprietary protocol—the building's existing system couldn't address it, so we ended up pulling the sensors and using wall switches. Nobody was happy.

Ask the customer what control system is already installed. If they don't know, have them photograph the existing wall station and the drivers on a sample fixture. Ten minutes of photos saves a $600 re-order.

Step 6: Get lead times in writing—and pay for certainty when it matters

This is where I'll be very direct: in a deadline situation, the cheaper option with a vague lead time is more expensive than the pricier option with a committed ship date.

In March 2024 we paid about $400 extra in freight and a small scheduling premium to get guaranteed delivery on a cove-light order for a grand opening. The alternative was a stock allocation with a "probably next Thursday" promise, and a $15,000 event on the line. We paid the premium. The fixtures landed Wednesday. There's something satisfying about that—watching the install crew start on schedule while the GC walks through and doesn't have to ask uncomfortable questions.

After getting burned twice by "probably on time" I now ask for written ship dates. If the manufacturer won't commit, that itself is information.

Step 7: Read the freight and damage terms before you sign the PO

Last one, and it's boring for a reason. Commercial fixtures ship on pallets, often LTL. Damage happens. The question is who eats it.

Standard is FOB origin—meaning damage in transit is your problem the moment it leaves the dock, unless the carrier's terms say otherwise. Always have someone on site to receive, count, and photograph pallets before signing the BOL. If you sign "received in good condition" and then find cracked lenses, that's on you.

I keep a one-page receiving protocol taped to the dock door now. It has saved us on three claims in the last 18 months.

Two things I'd add in the notes

First, this pricing and process info was accurate as of Q1 2025. LED pricing moves—a 15-20% swing in a year on some families is not unusual. Verify current numbers before you budget.

Second, on the wholesale cost question specifically—there's no single "commercial lighting wholesale cost." Downlights, flood lights, and emergency units each have their own cost curves based on volume tier, driver choice, and finish. The best thing you can do is get two or three quotes on the same spec sheet, not three quotes on three different ones. I've seen that mistake cost a customer almost 22% on a single project because the specs weren't apples-to-apples.

That said, the checklist above is what I'd do first. Get the seven items right and the cost conversation becomes a normal business negotiation instead of a rescue mission.