It was a gray Tuesday in March 2024. I remember the exact moment because the weather matched my mood.
At the back of our Kenosha facility, a pallet of 340 high bay fixtures stood wrapped and ready for shipment. The order had come in from a regional distribution center client—a repeat customer who had specified Kenall commercial lighting based on our work at their first facility. The spec was standard: high bay units for the warehouse, recessed ceiling lights for the offices, and emergency egress fixtures throughout. Nothing unusual. I'd reviewed hundreds of similar orders.
The fixtures had passed our initial checks. The paperwork was in order. The dock team was waiting for my signature.
I didn't sign.
Something about the emergency light driver bothered me. Not the components themselves—those were standard across the Kenall ceiling light line. It was the label on the driver. A small detail. Almost invisible unless you were specifically looking for it.
This is where I usually explain why I caught it: I've reviewed roughly 200+ unique lighting fixtures a year for the past four years as a quality compliance manager here, and I've learned to trust those little nudges. In Q1 2024 alone, I rejected close to 6% of first deliveries. Most of the time, the reason was documentation, not hardware. But this one felt different.
The numbers said we were good. The spec sheets matched. The test certificates were current. The part numbers lined up with the bill of materials. Every spreadsheet analysis pointed to an approve-and-ship decision. My gut said verify it anyway.
Why I Ran the 90-Minute Test
The client's specification called for emergency light units with a 90-minute runtime. That's a common requirement in commercial buildings—the NFPA 101 Life Safety Code, for instance, requires emergency lighting to maintain illumination for at least 90 minutes when normal power fails (Source: NFPA 101, Section 7.9.2).
The driver was rated for 90 minutes. The battery pack was rated for 90 minutes. The paperwork said we were fine.
Here's the thing about emergency lighting, though: the sum of the components doesn't always equal the performance of the system.
I pulled a random unit from the batch—a "Friday afternoon unit," as the team calls them, the last one assembled before the weekend—and ran a full discharge cycle. Ninety minutes, per spec.
It failed at minute 78.
That's the point where the story turns. Not because a test failed—that happens. The surprise was why it failed. It wasn't the driver. It wasn't the battery. It was a charging circuit mismatch, introduced when a sub-supplier quietly changed a capacitor specification without notifying anyone. A tiny component. A single line item difference in an update nobody reviewed. Invisible to a standard visual inspection, but it caused the battery to drain roughly 15% faster than designed.
If that batch had shipped, those units would have passed every code inspection on day one. Then, during a real power outage somewhere down the line, they would have cut out twelve minutes early.
Honestly, I'm still not sure why our sub-supplier made that substitution without flagging it. My best guess is a cost-driven procurement decision that their quality team never reviewed. But that's speculation.
The Call to the Client
I called the client's facility manager—not the purchasing person. Not the project manager. The person who'd actually be standing in a dark warehouse if we got this wrong.
I told him what we'd found and what we planned to do about it: the batch would be rejected, the sub-supplier would rework every unit at their cost, and delivery would be delayed by about ten days.
His response took me by surprise. "I'm not happy about the delay," he said. "But I'm glad you checked. Our previous supplier would have shipped it and let us discover the problem later."
That line stayed with me. "Our previous supplier..."—that's the difference between a high bay supplier who treats compliance as paperwork and one who treats it as the product.
What to Look for in a Spotlight Supplier (or Any Lighting Supplier)
If you're reading this because you're trying to figure out what to look for in a spotlight supplier—or a high bay supplier, or an emergency light supplier—here's the honest version of what this incident taught me:
1. Ask about their verification process, not just their certifications
Any manufacturer can produce a UL certificate. That's the easy part. The real question is what happens between design and delivery. Is there a physical test? A sample audit? A full discharge cycle? Or just a checkbox on a spec sheet?
2. Look for suppliers who can tell you exactly what changed
Components change. Sub-suppliers change. That's normal in manufacturing. What matters is whether the manufacturer knows about the change and tells you. At Kenall, our vendor change-notification protocol requires suppliers to document any component change—even a capacitor in an emergency light driver. It's not glamorous. It costs money. It's also the thing that prevents the incident I just described.
3. Be suspicious of "within industry standard"
In my experience, that phrase often means "we hope you don't verify it." Industry standards are the floor, not the ceiling. Most commercial lighting products on the market meet minimum requirements. Fewer are built to perform reliably under real conditions. Ask which one you're buying.
4. Run the test you can afford before you pay for the one you can't
A 90-minute discharge test ties up a unit and a technician for an hour and a half. It costs money. But it costs a fraction of what a facility-wide emergency light failure costs in liability, safety, and lost time. As of January 2025, our verification protocol includes a full runtime discharge test on samples from every emergency light batch before it ships. That change came directly from this incident.
Prevention Is Cheaper Than Cure
There's something satisfying about a verification process done right. After the stress of the rejection, the rework, and the rescheduled delivery, watching those 340 units pass the 90-minute test—every single one—that was the payoff. Not because my ego needed it. Because the client's building was safer.
The client got their fixtures. The sub-supplier ate the rework cost. We tightened our protocol. And that client has ordered from us three more times since, including the emergency lighting package for a second facility.
But let me be honest about something: not every batch we shipped before this incident went through that level of testing. I'm not going to pretend otherwise. We learned this lesson the hard way, and I'm sharing it because maybe you're in the middle of making the same choice I was making last spring. The choice isn't cheap vs. expensive. It's supplier who verifies vs. supplier who doesn't. That's the difference you find out about at minute 78.
What Are You Actually Buying?
When you evaluate an emergency light supplier or a high bay supplier, ask yourself a simple question: what are you actually buying?
You're not buying a metal housing. You're not buying a driver or a battery pack. You're buying certainty—the certainty that lights stay on when the power goes out. That the code inspector signs off. That the facility manager doesn't get a 2 a.m. phone call.
That certainty isn't in a brochure. It's not on a quote sheet. It shows up in the verification practices you can't see until you ask.
So ask. Ask what happens before the fixture ships. Ask which tests they run that aren't required. Ask about the last batch they rejected and why. That story—not the product spec—is the best indicator of what you're actually buying.
— A quality compliance manager at Kenall, sharing a personal experience. Regulatory details should be verified for your specific jurisdiction and project requirements.
