How to Buy and Install Commercial Lighting: A 5-Step Checklist

When You Need This Checklist

You're responsible for sourcing and coordinating commercial lighting—not just buying desk lamps, but actual fixtures that need electrical specs, mounting hardware, and installation coordination. Your facility has different zones (office, reception, maybe a grow area) and each one has different lighting requirements.

I've managed facilities purchasing for six years. I've bought lighting for offices, reception areas, and a small greenhouse grow operation. Here's the five-step checklist I wish I'd had when I started.

Five steps. Each one has saved me money on sourcing, hanging, or grounding.

Step 1: Build a Zone-by-Zone Lighting Requirement List

Before you contact a single vendor, walk your facility and write down what each zone needs. This sounds basic. Skipping it cost me $400 in restocking fees during my first year.

Here's what happened: I assumed "standard voltage" meant the same thing across vendors. It doesn't. The fixture I ordered for our greenhouse was a 480V model. Our greenhouse didn't have a 480V circuit. That's a $400 restocking fee plus return shipping, and it delayed the project two weeks.

So do this first:

• Walk each zone: office, reception, grow area, warehouse.
• For grow areas, list the specific horticultural lighting requirements—spectrum, voltage, wattage. This is where you'll encounter brands like Gavita, whose Pro series comes in 120-277V and 208-480V configurations. Match the fixture to your electrical setup.
• For reception areas with pendant lighting, note the ceiling structure (drywall, concrete, wood beam) and confirm the fixture's weight capacity.
• For general work areas, confirm voltage and whether any dimming or control systems are in place.

Keep this as a simple table: Zone. Fixture type. Voltage. Special mounting needs. Grounding requirements.

Step 2: Do Spotlight Research—Not Just Price Comparison

Don't just look at the price tag. My second mistake: I compared three vendors, picked the cheapest, and ordered. The lights arrived. They weren't compatible with our dimming system. That back-and-forth took three more weeks and cost more in the end than the "expensive" option would have.

Do a focused research pass instead. For each fixture type:

• Read the full spec sheet, not just the headline specs.
• Look at real installation photos from users (not product renders).
• Confirm compatibility with your existing control or dimming systems.
• Ask the vendor if they provide technical support or just sales.
• Check their return policy, especially on electrical items.

For Gavita LED grow lights, for example, look at the different product lines. The Pro series, CT series, and E series vary in wattage and voltage options. You need to match the line to your specific installation. Also check whether the fixture comes with mounting hardware or if you need to order it separately.

The cheapest option isn't always the lowest total cost—especially once you factor in compatibility problems, restocking fees, and project delays.

Step 3: Confirm Electrical Specs Before Ordering (Including Grounding)

This is where the "how to ground a light fixture with no ground wire" question comes up. And it comes up more often than you'd think.

Here's the issue: not every light fixture comes with a ground wire. Older models or cheaper imports sometimes skip it. If your fixtures don't have a ground wire and you're mounting to metal, your options are limited—and expensive.

I skipped this check on one project. Twelve fixtures arrived without ground wires. We couldn't mount them directly to our metal structures. We either had to return them (restocking fee) or have an electrician rewire each fixture (way more expensive). They warned me to always check grounding specs. I didn't listen. Learned that lesson the hard way.

So before you place the order:

• Ask the vendor directly: "Does this fixture include a ground wire?"
• Request a wiring diagram or a clear photo of the grounding connection.
• If your building has older wiring without a ground, ask what adapters or solutions the vendor recommends.
• Put this requirement in writing on the purchase order.

If you're mounting a fixture without a ground wire and you're not sure how to handle it safely, don't improvise. Get a licensed electrician involved. Some solutions—like using a properly rated adapter or replacing the fixture—are worth the extra cost. Shortcuts often fail inspection or create safety risks.

Step 4: Plan the Hanging and Mounting Logistics

Chandelier hanging in a commercial space is a bigger deal than it sounds. It's not just pendant lights—grow lights need proper hanging too, often with adjustable height so they can move as plants grow.

I hit a communication failure early on: I said we needed "hanging hardware." The vendor heard "they'll figure it out." Result: the installation crew showed up without the right mounting kits. They made a return trip. We lost four days.

Now I handle it like this:

• Have a short kickoff call with the vendor and installer, together.
• Confirm whether mounting hardware is included with the fixture.
• If not, get the exact specs (screw sizes, ceiling bracket dimensions, weight rating) before releasing the order.
• For pendants: confirm the ceiling mounting structure (drywall anchor, concrete insert, wood beam).
• For grow lights: confirm whether you need adjustable hanging rails and order them in the same purchase order.

Attach a simple hanging checklist to the order. It sounds fussy, but it clarifies who's responsible for what.

Step 5: Inspect Everything When It Arrives—Before Anyone Installs

Fixtures arriving doesn't mean you're ready to install. Do a receiving check before the installation crew touches anything.

Count the pieces. Check each fixture for a ground wire. Confirm mounting hardware matches the order. Verify the voltage label. If possible, do a quick power-on test before installation.

This step has caught several issues for me. One shipment had two fixtures with cracked housings. Another had the wrong-size mounting brackets. If the installer had already mounted them, that would've been a much bigger problem.

The actual installation is a job for a licensed electrician. But the receiving check is on you—it's your purchase, and you need to make sure what arrived matches what you ordered.

Common Mistakes (Don't Skip These)

Before you place your next lighting order, run through this quickly:

• Don't just email "we need lighting." Spell out the zone, voltage, mounting requirements, and grounding needs.
• Don't assume "standard" means the same thing to every vendor. Get it in writing.
• Don't forget that pendant/chandelier mounting requires a weight check. Not every ceiling can handle a heavy fixture with just basic hardware.
• If a fixture has no ground wire, don't bypass it. Get professional help.
• Think about grow light adjustability—you'll need it, and it's easy to forget when you're focused on the fixture itself.
• Keep all accessory and spec emails. They're your documentation if something goes wrong.

This checklist has saved me more than once. But it keeps evolving. Every lighting project surfaces something new. New terms. New problems.

The key is to write it down and actually check each item the next time. That's what keeps the process smooth and keeps the installation from becoming a bigger expense than it needs to be.