Cree LED Downlights and Modules: A 7-Step Procurement Checklist for Office Retrofits

Who this checklist is for

I'm an office administrator for a 250-person company. I manage lighting and electrical ordering—roughly $180,000 annually across about 10 vendors. I report to operations and finance. When we started replacing old fluorescent troffers and can lights in 2024, I had to figure out how to buy Cree LED downlights, Cree LED modules, and waterproof downlights without creating a warranty or invoicing mess.

This checklist is for anyone who has to order commercial LED lighting but isn't an electrician. It won't make you a lighting designer. It will help you avoid the mistakes that cost us time and money. There are seven steps. The whole process takes about two weeks for a standard office retrofit if you already know your room dimensions.

One boundary: my experience is based on about 70–90 lighting orders for mid-size offices and light-industrial spaces. If you're specifying for a hazardous location, cleanroom, or high-bay factory floor, your specs will be different.

Step 1: Define the space before you look at any Cree SKU

Write down four things: ceiling height, ambient temperature, whether the location is wet/damp/dry, and how the lights are controlled. A conference room with a 9-foot ceiling is not the same as a covered loading dock.

For a waterproof downlight, you need to know if it's a bathroom, a covered soffit, or an exposed exterior wall. 'Waterproof' gets used loosely. Check the IP rating. IP65 handles water jets; IP66 handles stronger jets; IP67 handles temporary immersion. For most covered exterior downlights, IP65 is usually enough. For open outdoor, go higher.

Checkpoint: You should have a one-page sheet with room name, dimensions, wet/damp/dry, and control type (switch, 0–10V dimmer, DALI, etc.).

Step 2: Match the Cree product family to the job

Cree sells components and finished fixtures. A Cree LED module is not the same as a Cree downlight. The module is the light engine (sometimes called a light engine or LED module). The downlight is the complete fixture—housing, trim, driver, and module.

If you're retrofitting existing cans, you may only need Cree LED modules and compatible drivers. If you're doing a new ceiling, you'll probably buy complete Cree LED downlights. Don't assume a module will fit any housing. It won't.

Ask the supplier for the cut sheet and the compatibility matrix. If they can't send a PDF, that's a red flag. In 2023, I ordered modules for a hallway retrofit because they were cheaper. They didn't fit our old Halo cans. We ended up returning 40 modules and buying complete downlights. The return shipping ate the savings.

Step 3: Understand what an LED light driver circuit does

This is the step most office buyers skip. If you've ever asked, 'what does an LED light driver circuit do?' here's the plain answer: it does the same basic job as a ballast in a fluorescent fixture. It takes incoming AC line voltage and converts it to low-voltage DC. But LEDs need more than voltage—they need regulated current. A constant-current driver keeps the current steady so the LED doesn't overheat or flicker.

If you mismatch the driver and the LED module, you get problems: flicker, shortened life, or a fixture that dies in a month. That's why you need the driver datasheet, not just the module datasheet.

I knew I should ask for the driver datasheet, but thought 'Cree is Cree, it'll work.' That was the one time we got fixtures with 0–10V drivers and our existing wall controls were phase-cut. We had to swap 18 drivers. Labor cost more than the fixtures.

Checkpoint: Confirm driver type (constant current vs. constant voltage), input voltage (120V vs. 277V), dimming protocol, and whether the driver is included or sold separately.

Step 4: Verify the waterproof downlight rating—and the trim

For a waterproof downlight, the IP rating is only part of it. The trim and gasket matter too. A fixture can have an IP65 driver but a trim that lets water pool around the lens. Look for 'suitable for wet locations' on the UL label, not just 'waterproof' in the marketing copy.

Also check the trim style. Open trims, lens trims, and baffle trims all handle moisture differently. In a bathroom with a shower, you want a gasketed lens trim. In a covered outdoor entry, a standard trim with IP65 may be fine.

Note to self: keep a photo of the UL label on your phone. It's faster than digging through emails when finance asks why the invoice says 'wet location.'

Step 5: Ask for photometric files and incentive listings

If you're buying Cree LED downlights for a commercial space, ask for IES files and DLC or ENERGY STAR listings. DLC listing matters if you're in a utility rebate program. It also gives you a third-party check on lumen output and wattage.

You can search the DLC Qualified Products List at designlights.org. If the model isn't listed, the rebate probably won't happen. That's not a deal-breaker for every project, but it is for a 200-fixture office retrofit.

Also ask for lumen maintenance data (L70 or L90). It tells you how long before the light drops to 70% or 90% of its original output. The numbers are estimates, but they're better than nothing.

Step 6: Vet the supplier's invoicing and warranty process

This is the unglamorous step that saves you from finance rejection. Before you place a $20,000 order, confirm the vendor can send a proper invoice with PO number, line items, tax, and payment terms. Ask for a sample invoice. If they only do handwritten receipts, walk away.

In 2022, I found a great price from a new vendor—$2,000 cheaper than our regular supplier. They couldn't provide a proper invoice. Finance rejected the expense report. I ate $2,400 out of the department budget. Now I verify invoicing capability before placing any order.

Warranty is the other half. Get the warranty length in writing and who handles the claim—the vendor or Cree. If the vendor disappears, can you still file? Ask.

Step 7: Run a pilot order and inspect before the full rollout

Order 5–10 fixtures. Install them in one room. Check for flicker, color consistency, and dimming range. Use a light meter app if you don't have a real meter. Compare the actual color temperature to the spec. '3000K' should look warm white, not yellow or blue.

If you're mixing Cree LED modules with existing drivers, test that combo in the pilot. Don't assume. We saved $120 by ordering downlights without the trim kits, thinking we could reuse old trims. The old trims didn't fit. We spent $600 on expedited trim orders and labor. That was a no-brainer mistake I won't repeat.

Checkpoint: Pilot pass/fail criteria: no flicker at any dim level, no visible color shift between fixtures, no buzzing, and invoice matches PO.

Common mistakes and final notes

• Trusting 'waterproof' without an IP rating. Ask for IP65 or higher for wet locations, and check the UL wet-location mark.
• Ignoring the driver. The LED light driver circuit is not an accessory. It's half the system. Match constant-current rating, voltage, and dimming protocol.
• Skipping the sample invoice. A cheap fixture isn't cheap if finance rejects the invoice.
• Buying modules for existing cans without a compatibility check. Cree LED modules are not universal.
• Forgetting the controls. If your building uses 0–10V and you buy phase-cut dimming fixtures, you'll pay twice.

My experience is based on mid-size office and light-industrial orders. If you're working with high-bay or hazardous environments, your experience might differ. But the basics—define the space, match the driver, verify the waterproof rating, vet the invoice—hold up across most commercial LED projects.

Bottom line: the efficient process isn't just faster. It's the difference between a retrofit that finance approves and one that sits in a rejected expense report.