Who This Checklist Is For

If you're planning a commercial lighting retrofit or new build, you’re likely juggling specs from manufacturers like Acuity Brands, coordinating with electricians, and trying to hit a budget. I’ve been on your side of the table.

As a quality compliance manager, I review every lighting fixture and control component before it reaches a customer. Roughly 400 unique items per year—fixtures, controls, drivers, even mounting hardware. In 2024 alone, I rejected 18% of first deliveries because specs were off. Not catastrophic—a batch of DTL photocontrols where the light sensitivity threshold drifted 15% from our spec. The vendor called it “within tolerance.” We called it a redo.

So, here’s a checklist that works for my team. It’s not theory. It’s 7 steps I use weekly. Follow it, and you’ll avoid the most common reasons commercial clients call me after installation—wrong parts, missed specs, and unexpected costs.

Let’s break it down.

Step 1: Lock Down the Spec Sheet – Not Just the Product Name

The single biggest mistake I see: ordering by product name alone. “Acuity Brands DTL photocontrol” sounds specific, but it’s not. There are multiple models, voltage ranges, and switching configurations (dark-to-light, light-to-dark, delayed-off).

Real talk: every spec discrepancy I’ve seen starts with someone assuming “standard” means the same thing to everyone. It doesn’t.

What to do:

  • Get the full part number, not just the product family.
  • Confirm voltage, load rating, and form factor. For DTLs, confirm the light level threshold (foot-candles).
  • If you’re matching an existing system, get a sample of the existing part and compare side-by-side.

Checkpoint: Does your purchase order have a part number that matches the manufacturer’s current datasheet? (Not last year’s.) Acuity Brands updates components, and sometimes the new part doesn’t fit the old socket. That’s a $22,000 redo I’ve seen twice.

Step 2: Plan for the “Hidden” Components

I wish I had tracked this metric more carefully. What I can say anecdotally is that roughly 30% of our rework orders involve missing or wrong ancillary parts—not the fixtures themselves, but the mounting brackets, wire connectors, gaskets, and control interfaces.

For a commercial installation using Acuity Brands products, that often means:

  • Ceiling fixture mounting adapters (for grid, drywall, or suspension)
  • Chandelier shade rings or trim rings for decorative fixtures
  • Photocontrol swivel adapters or replacement lenses
  • Wire extension kits, especially if you're figuring out how to extend pendant light cord lengths

What to do:

  • Create a full BOM (bill of materials) that includes every bracket, nut, and wire.
  • Don’t assume the fixture includes the control. Many commercial LED fixtures ship without a photocontrol. You order that separately.
  • If you’re replacing old fixtures, check the existing mounting. That old chandelier shade might use a 2024-era thread that doesn’t fit new Acuity Brands trim.

Checkpoint: Have you confirmed the exact connectors for the control system? DTL photocontrols use NEMA twist-lock or ANSI C136.10. Don’t guess—check the catalog.

Step 3: Inspect the Fixture Housing – Not Just the Light Output

Everyone checks lumens. Fewer check housing integrity. In a 2023 audit, I found that 12% of received LED strip lights from one batch had visible gaps in the aluminum extrusion. The light worked fine. The heat dissipation didn’t. That’s a ticking maintenance issue.

This worked for us, but our situation was mid-size commercial with predictable ordering. If you’re dealing with high-vibration environments (like warehouse forklift zones) or wet locations, the calculus might be different—you’ll want IP65+ rated housings regardless of what the fixture price is.

What to do:

  • Visual inspection: check for dents, gaps, corrosion spots, or loose end caps.
  • Seal check: for outdoor or damp-rated fixtures, verify gaskets are seated. LEDs fail early when moisture gets in.
  • Mounting check: ensure the fixture’s mounting structure matches your ceiling type. A “light ceiling” grid tile won’t support a heavy chandelier without reinforcement.

Checkpoint: Does the shipment include the matching trim and shades? A chandelier shade from a different series might look similar but have a different aperture size. That’s a cosmetic redo, and it’s frustrating.

Step 4: Verify the Control System Before Installation

Here’s the thing: controls are where most of the value and most of the headaches live. Acuity Brands’ DTL (dark-to-light) photocontrols are excellent—when they’re set up correctly. But I’ve seen installs where the electrician wired the photocontrol to the wrong load or set the daylight delay to zero, causing lights to flicker every time a cloud passed.

What to do:

  • Test one control before installing all of them. Connect it to a fixture in the shop. Does it switch at the expected light level?
  • Confirm the load rating matches the fixture. Overloading a photocontrol is a fire risk. Underloading is a premature failure risk for the control’s relay.
  • If you’re using the DTL for an area with windows or skylights, test at the actual installation location. The light level may be different from the shop.

Checkpoint: Have you set the desired light level threshold? The default might be 10 foot-candles. Your client needs it at 5. That’s a one-minute adjustment now, versus a callback later.

Step 5: Plan the Cord and Wire Extensions – Properly

“How to extend pendant light cord” is a common search. It’s also a common cause of code violations. The risk isn’t just a messy install; it’s a fire hazard if the wrong gauge wire is used or splices are made incorrectly.

What to do:

  • Use listed extension kits. Acuity Brands offers extension cables for specific pendant fixtures. Those maintain the correct gauge and strain relief.
  • If you’re using generic wire, match the gauge exactly. A 0.5mm² wire for a 3A fixture is undersized over 10 feet. Calculate voltage drop.
  • Splice only in accessible junction boxes per NEC 314.16. No hidden splices above the ceiling tile.

Checkpoint: Is the final cord length within the fixture’s listed maximum? Some pendants have a max unsupported length. Exceeding it can stress the connection inside the canopy. That’s a liability.

Step 6: Calculate the Total Cost – Not Just the Fixture Price

The $500 fixture quote might not include the photocontrol ($85), the extension kit ($32), the mounting adapter ($18), shipping ($45), or the rush fee if you’re behind schedule ($70). That $500 fixture becomes $750. The $650 all-inclusive quote from another supplier might have been cheaper.

I now calculate TCO before comparing any vendor quotes. For an installation using Acuity Brands products, here are the costs that often get missed:

  • Setup or configuration fees (if controls need pre-programming)
  • Shipping & handling (especially for bulk orders of heavy fixtures)
  • Rush fees (if the timeline is tight)
  • Potential reprint costs (quality issues from wrong specs)
  • Time cost of your team managing returns and replacements

Even after choosing the more expensive all-inclusive package for a recent project, I kept second-guessing. What if I could have saved $2,000 by piecing it together? The two weeks until delivery were stressful. Then the shipment arrived complete and on-spec, and I never thought about the savings again. The certainty was worth it.

What to do:

  • Create a TCO worksheet for any RFQ over $5,000.
  • Ask vendors for “delivered and installed” pricing.
  • Factor in your labor cost for returns and rework. That’s real money.

Checkpoint: Does your budget include a 10-15% contingency for unexpected components? Commercial installs always require one trip to the supply house for “just one more bracket.” Budget for it.

Step 7: Final Quality Check – Before the Ceiling Goes Up

Don’t wait until after installation to find the problem. By then, you’re paying for an electrician to take the fixture down, a redo, and a reschedule.

What to do:

  • Do a dry fit of one complete assembly: fixture + mounting + control + trim/shade.
  • Test the control in the dark and in light. Does the DTL switch off below the set threshold? (Surprise, surprise—some units from a new batch didn’t switch at all. A bad batch of sensors.)
  • Check the fixture driver label. Does it match the specified voltage (120/277/347V)? Mixed up drivers cost us a $1,400 redo in 2022. We had 100 units at 347V for a 277V job.

Checkpoint: Has someone visually confirmed all mounting hardware is present? A missing lock washer for the chandelier canopy isn’t just a nuisance—it’s a safety issue. I’ve rejected batches for that more than once.

Common Mistakes and What to Watch For

Over 4 years of reviewing install specs, these are the top 3 recurring mistakes I see:

  1. Assuming control compatibility. An “Acuity Brands DTL” from one series may not communicate with the same brand’s newer control platform. Check the ecosystem compatibility sheet.
  2. Skipping the sample check. I can only speak to domestic installations. If you’re dealing with international shipments, there are customs and voltage factors I’m not aware of. But for domestic, always get a sample shipped before the bulk order. It’s $50 that saves $5,000.
  3. Ignoring the installation instructions. Yes, the instructions are generic. But they often specify torque values for mounting screws and wire gauge minimums. Ignoring those is how you get a call from the client a year later with a flickering fixture.

Look, I’m not saying budget options are always bad. I’m saying they’re riskier, and the risk isn’t just financial. It’s your reputation. A single callback on a 100-fixture job can wipe out your margin on three other jobs.

Follow this checklist. I wish everyone I work with did. It would save a lot of my Mondays.