This checklist is for anyone who has to sign off on a lighting control installation using Acuity Brands gear—whether you're a facility manager, a general contractor, or the person taking delivery of a 200-fixture order.

I review roughly 300+ unique lighting deliverables a year as a quality compliance manager. About 18% of first deliveries get rejected—usually for things that could have been caught with a simple verification process. Here's the 7-step checklist I use for Acuity Brands lighting controls. It's not theoretical. It's what I actually walk through with our warehouse and installation teams.

Step 1: Verify the Control System is Actually a System

This sounds obvious, but the most common issue I see is mismatched components. Someone orders Acuity's nLight controls and assumes any Acuity fixture is compatible. That's not always the case.

Check that the control system type—whether it's nLight, nLight EZ, or a standalone DTL photocontrol—is listed on the fixture spec sheet. I've rejected batches where the fixtures had a 0-10V dimming driver but the control system was nLight (which uses a different protocol). The vendor claimed it was 'standard practice.' We rejected the batch. Now every PO explicitly states the control system type and driver compatibility.

Quick check: Open the fixture spec sheet and find the line that says 'Control Type.' If it says 'nLight' or 'nLight EZ,' the fixture must have the correct network interface card installed.

Step 2: Confirm the DTL Photocontrol Wiring (It's Not Always Universal)

Acuity's DTL (Dark to Light) photocontrols are popular for street and area lighting. But here's something vendors won't tell you: the DTL photocontrol isn't a one-size-fits-all replacement for an existing photocontrol, even if the base looks compatible.

We had a batch of 50 fixtures where the DTL unit was wired for normally-open operation but the site wiring was normally-closed. The contractor spent 4 hours on-site trying to troubleshoot before someone checked the wiring diagram. That's a $1,200 redo on a Friday afternoon.

Go check: The DTL photocontrol spec sheet should clearly show the wiring diagram. I always insist on seeing it before ordering. If the spec sheet says 'factory default: normally-open,' and the site uses normally-closed, you need to either order a different model or specify the wiring change on the PO.

Step 3: Check the Class P LED Driver Marking

This is a question that comes up in a lot of our technical calls: 'what is a class P LED driver?' It's not just an Acuity thing—it's a UL requirement that applies to any LED driver marketed for use in recessed or enclosed luminaires.

A Class P driver has been tested and certified for thermal protection. If it overheats (due to poor airflow, insulation covering the fixture, or wrong dimmer), it automatically reduces power instead of failing catastrophically. Non-Class P drivers may not have this protection.

Here's the check step: Look at the driver label inside the fixture. It should clearly say 'Class P' or have a UL marking indicating Class P classification. If it doesn't, and the fixture is going into an insulated ceiling or an enclosed space, reject it. I've seen drivers fail in storage conditions because the ambient temperature exceeded the operating range.

Step 4: Inspect the Zigbee Module Mounting (It's the Weak Point)

Acuity uses Zigbee for some of its wireless controls, particularly in retrofit and commercial applications. The Zigbee module is usually a small dongle or puck that plugs into the fixture. My warehouse team has found these modules loose more than once.

The check: Give the module a gentle but firm tug. If it comes off the mounting bracket, it wasn't properly seated. That's a reject. On a 200-unit order, we found 8 modules that weren't clicked in all the way. The vendor had to send a tech to our warehouse to re-seat all of them.

Also check the antenna orientation if there's an external one. Zigbee modules typically have a recommended orientation for best signal. The mounting location inside the fixture can affect this—I've seen modules mounted against metal housing that degraded the signal.

Step 5: Run the System Commissioning Test (Don't Skip This)

This is the step most people skip because it takes time. You have the fixtures, you have the controls, you have the wiring. But without commissioning, you don't actually know it works.

For nLight systems, this means downloading the commissioning software (it's free from Acuity's website) and running a basic group assignment and scene test. We had an order of 100 nLight fixtures where 15% didn't respond to the group command. The issue was a firmware mismatch—the control modules had been shipped from two different production batches with different firmware versions.

I recommend: Commission a sample set of 10% of the fixtures before accepting the full order. For large orders, push for a full commissioning test at the vendor's facility before shipping. We added this to our contract terms after the firmware mismatch incident cost us a 3-week delay.

Step 6: Verify the Fixture Aiming (For Spotlights and Accent Lighting)

If your Acuity order includes adjustable fixtures—like spotlights for retail displays or accent lighting for architectural features—check the aiming mechanism.

What I check: Can the fixture aim in the required direction without hitting a hard stop? I've seen spotlights that were supposed to be adjustable but had the locking screw so tight they were essentially fixed. And track fixtures that couldn't aim vertically because the slot was positioned wrong.

For staircase chandelier applications, the issue is often glare control. Acuity offers fixtures with different shielding options. If the spec says 'adjustable' but doesn't specify the shielding, the adjustable angle might allow direct glare into the line of sight. That's a safety issue, not just an aesthetic one.

Step 7: Request the Documentation (and Actually Read It)

This is where most people stop checking and start trusting. Don't.

I require the following documents for every Acuity order over $5,000:

  • Driver spec sheet (verify Class P marking, dimming protocol, and operating temp)
  • Control system compatibility statement (not just a brochure, but a signed statement from the vendor)
  • Photocontrol wiring diagram (for DTL units)
  • Commissioning report (from the sample test, not the production run)

I had a project where the vendor supplied a 'compatibility matrix' that turned out to be a generic marketing sheet. The control system wasn't actually compatible with the specified dimming driver. That cost us a $22,000 redo and delayed the project launch by 6 weeks.

Per FTC guidelines, claims about product compatibility must be substantiated. If the vendor can't provide a written compatibility statement with a clear reference to Acuity's published specs, that's a red flag.

Bottom Line

I'm not an electrical engineer, so I can't speak to the internal circuit design of Acuity's controls. What I can tell you from a quality management perspective is that most issues happen at the interfaces—where the control meets the fixture, where the wiring meets the photocontrol, where the spec sheet meets the actual hardware. This checklist catches those issues before they become site problems.

That said, my experience is based on about 300 mid-range to large commercial orders. If you're working with a custom integrated control system or a specialized application like hazardous location lighting, your checkpoints might be different.