Who this checklist is for

I handle facilities procurement for a 240-person company. My background is operations, not lighting design. In 2024 I processed roughly 140 lighting-related orders—maybe 130, I'd have to check the system—across three buildings. LED retrofits, emergency fixtures, smart controls, even a horticultural setup for the break room plant wall.

I've made expensive mistakes. I've also learned what to check before the purchase order goes to finance. This is that checklist: seven steps, in the order I actually run them.

Step 1: Map every space type before you open a catalog

The instinct is to start with "how many fixtures do we need." That's the wrong first question. Start with what each space does.

For our open-plan floors, that meant 4000K panels, >80 CRI, 0-10V dimming. For the executive conference room, the requirement was stranger: a downlight speaker unit that shares ceiling real estate with the AV system. Our AV vendor quoted ceiling microphones and speakers separately. The facilities lead asked why we couldn't combine them. Fair question—integrated units exist now, and they saved us cutting double the holes in a new ceiling.

Then there's the break room plant wall. HR added it to the scope. Nobody thought about the lighting until a week before install. The rule of thumb from the horticultural supplier was 14-16 hours of light daily for vegetable starts, about 12 for herbs and leafy greens. That's how many hours of grow light for seedlings actually need—more than I expected. We ended up with a programmable fixture and built the schedule into the facilities calendar.

Write down every space, every use case, every weird request. The weird ones are what blow up budgets later.

Step 2: Match the driver to the application (the step most people skip)

This is the one that almost cost us. Everything I'd read about LED procurement said the driver is a commodity—check voltage and wattage, move on. In practice, the driver is the first thing to fail in most installations I've dealt with.

We specified a led driver osram 12v for the lobby display case lighting. Our electrician caught something in the spec sheet I would have missed: the original cheap driver was constant voltage. The LED strips needed constant current.

"Same voltage rating. Completely different behavior under load. You'd have burned through those strips in six months." — Our electrician, explaining why the cheap driver was the wrong choice.

Now I ask three questions before any driver gets approved:

  • Constant voltage or constant current? Match this to the LED load type, not the voltage rating.
  • What's the operating temperature range? A driver rated for 40°C ambient doesn't belong in a ceiling void that hits 55°C.
  • Does the fixture maker publish a driver compatibility list? Or do they only sell their own?

If the vendor can't answer these, I do not move forward. No exceptions. Not even for a $200 fixture.

Step 3: Read the lamp guide, not just the sales sheet

I keep an osram lamp guide printout in my desk drawer—not because I'm brand-loyal to a fault, but because lamp codes make no sense without a reference. I've used Osram, Philips, and a handful of generic suppliers; the guide format varies, but the parameters I check are the same. The difference between an 840 and an 830 tube is color rendering, and nobody on a sales call will explain that unless you ask.

A sales sheet will tell you "high efficacy" and "long life." A proper lamp guide tells you the actual lumens per watt, the CRI, the rated life at L70 or L80, and the dimming compatibility. Those last two matter more than most people think. A fixture rated for 50,000 hours at L70 gives you 30% light depreciation by end of life. If your space needs consistent brightness for task work, plan for the depreciation, not the marketing number.

Per IES LM-79—the photometric testing standard—reported lumen output should be based on integrating sphere measurements. Most spec sheets won't tell you the test conditions. That's why I check the actual test report, not the summary.

My rule: if the product data sheet doesn't list L70 or L80 life, CRI, and dimming protocol, it's not a spec sheet. It's an ad.

Step 4: Plan the Zigbee network before the fixture count

Smart lighting sounds simple until you deploy it. We wanted occupancy-based dimming and scheduling across two floors. The vendor proposed Zigbee controls.

Here's what I didn't know: a zigbee cluster isn't just a buzzword. It's the network topology—how devices group and route. If you spec 200 sensors and 15 gateways without planning the cluster layout, you get dead zones and sensors that drop off the mesh. One of our east-wing corridors had exactly that problem. The fix took two weeks of troubleshooting—or rather, closer to three when you count the wait for firmware approval.

Now I ask for a network diagram before signing. How many routers per cluster? What's the max hop count? Where are the repeaters? Does the system fall back to local control if the gateway goes down?

If the vendor can't draw the network, they haven't designed it. They're selling you boxes.

Step 5: Confirm the certifications and the dependencies

This is process work, but it protects you. Check for LM-79 and LM-80 test reports. IP ratings if fixtures are in wet or dusty areas. CE or UL listing depending on your jurisdiction. ANSI C78.377 defines the color temperature ranges for solid-state lighting—a "3000K" fixture that measures 3200K is still within tolerance, but it will look different next to a true 3000K unit in the same room.

More importantly, check what the product depends on. Does the driver need a specific dimming protocol? Does the Zigbee gateway require a cloud subscription? Does the emergency lighting system need a separate battery backup circuit?

Every dependency is a line item you haven't budgeted for. I found that out when a gateway subscription added $1,200 annually to a project I thought was a one-time purchase.

Step 6: Lock in delivery terms with a penalty clause

I learned this one the hard way. In March 2023, we ordered 60 fixtures—if I remember correctly, maybe 65—for a client-facing floor with a hard move-in date. The vendor said "probably two weeks." I didn't get it in writing with a penalty. They delivered late. The move-in slipped three days. My VP asked why the floor wasn't ready. I didn't have a good answer.

I still kick myself for not putting a delivery penalty in that contract. If I'd specified liquidated damages of $200 per day, we would have had leverage. Instead I had an apology and a slightly reduced invoice.

What changed after that miss

Now every lighting PO above $5,000 includes a delivery clause: guaranteed date, penalty per business day late, and a named account manager. In March 2024, we paid a 12% premium—about $340—for a guaranteed delivery window on a boardroom refit. The alternative was missing a scheduled board meeting.

Is the premium worth it? Depends on what you're protecting. For a boardroom with an immovable date, yes. For a storage room refresh? Probably not.

Time certainty is worth something. I budget for it now. The vendor who says "probably on time" costs more in the long run than the one who guarantees it and charges for the promise.

Step 7: Plan for inspection and spare inventory

The last step isn't about ordering—it's about what happens when the pallets arrive. I inspect at delivery: count fixtures, check for damaged lenses, test three random units for color consistency with a colorimeter, and confirm the driver model matches the spec.

Then I order spares. 5-10% of total fixture count for anything with a custom finish or long lead time. LED fixtures aren't as interchangeable as bulbs. If a sensor fails two years from now and the model is discontinued, you're replacing the whole zone.

There's something satisfying about a clean closeout. After all the spec sheets, the driver questions, the Zigbee diagrams, seeing a lit floor with zero callbacks. That's the payoff.

What I'd add if I were starting over

Three things I'd do differently.

First, I'd build a one-page spec template for every lighting order: space type, driver type, lamp guide reference, network requirements, delivery terms, spare count. Half my mistakes came from missing one of those fields.

Second, I'd develop a relationship with one electrical distributor who understands the building, not just the SKU list. Price matters, but the vendor who catches your constant-voltage mistake before it ships is worth a small premium.

Third, I'd stop assuming "smart" means "easy." Zigbee clusters, driver compatibility, integrated downlight speakers—each one adds a configuration layer. Plan for that layer before the ceiling goes in.

That's the checklist. Seven steps, three notes to self. If you're staring down a lighting order and something feels off, it's probably in here somewhere.

Note: prices cited here reflect actual invoices from 2023-2024. Verify current pricing with your vendor before budgeting.