The Lighting Retrofit That Taught Me to Ask What's NOT Included

It started with a flickering ballast and a budget I didn't want to explain

In Q1 2024, I was the office administrator for a 180-person company. I manage facilities and office supply ordering—about $240,000 annually across 12 vendors. I report to both operations and finance, which means every purchase has two audiences. The lighting in our three buildings had been on the 'replace when it dies' plan for years. Then one of the finance managers walked me past a conference room where the lights were flickering like a bad horror movie.

That week, our facilities lead retired. Suddenly I owned the lighting retrofit. I'm not an electrician, and I'm not a lighting designer, so I can't speak to photometrics or circuit loads. What I can tell you from a purchasing perspective is how fast a simple 'replace the old lights' project turns into a spec-sheet scavenger hunt.

The quote that looked good until I asked what wasn't in it

We got three quotes. One was about 18% lower than the other two. That should've been a red flag. I asked the low vendor what was included. Fixtures, yes. Installation, yes. Drivers? 'Oh, those are extra.' Emergency modules? 'Extra.' Downlight surrounds? 'You mean the trims? Extra.'

That's when I learned my first real lesson: the sticker price is not the price. Ask what's NOT included before you ask what it costs. A transparent vendor will list exclusions upfront, even if the total looks higher. The low quote ended up being the most expensive once we added the parts that actually make the lights work.

I've learned to ask 'what's not included?' before 'what's the price?' It saves a lot of awkward conversations with finance.

Signify, Philips, and the driver I didn't think about

We ended up standardizing on Signify for most of the retrofit. Philips Lighting renamed itself Signify in 2018 (often searched as 'Philips Lighting renamed Signify 2018'), but half our old spec sheets still said Philips. That naming overlap matters when you're searching for compatible parts. You can find an old Philips document and a new Signify page for the same product family, and if you don't pay attention, you'll order the wrong thing.

The part I underestimated was the driver. I thought a driver was a driver. Bad assumption. For one conference room, we ordered an Advance by Signify LED electronic driver because it matched the fixture brand. What I didn't verify was the dimming protocol. The existing controls were 0-10V. The driver we bought was set up for a different control method. The electrician caught it before install, but we still lost two weeks swapping it out.

I'm not an electrical engineer, so I can't tell you how to program every driver. What I can tell you is that 'compatible fixture' doesn't always mean 'compatible system.' Before you buy, put the driver, the control, and the existing wiring on the same page. Literally. Make a one-page checklist.

Downlight surrounds, oprawy downlight, and the language problem

Our European office sent a request for 'oprawy downlight' for a small renovation. I speak enough Polish to order lunch, not enough to argue about lighting terminology. I ran it through a translator and got 'downlight fixtures.' We ordered based on that. When the shipment arrived, the team asked where the downlight surrounds were. I said, 'The what?'

In our U.S. office, we called them trims or bezels. In the Polish spec, 'oprawy downlight' covered the fixture body, but the surrounds—the visible ring around the light—were a separate line item. We were using the same words but meaning different things. We discovered this when the electrician opened the boxes and said, 'These won't cover the ceiling cutouts.'

That mistake cost us about $600 in expedited shipping and a lot of goodwill. Now, for any cross-border lighting order, I ask for photos and part numbers, not just translated descriptions. A photo of the exact downlight surround beats a dictionary every time.

Can you cut LED strip lights to size? The answer I gave too fast

While the main retrofit was dragging, our marketing team asked for under-cabinet LED strip lighting in a new break area. Someone asked, 'Can you cut LED strip lights to size?' I said yes. I'd seen people do it. I didn't think about cut marks, IP ratings, or whether the strip was addressable.

We bought a reel of LED strip. The installer cut it at a random spot because the run was a few inches short. Half the strip went dark. The manufacturer's spec sheet showed cut marks every few inches, and we'd cut between them. The strip wasn't ruined, but we had to buy a new reel and do it again.

So here's the honest answer: sometimes you can cut LED strip lights to size, but only at marked cut points, and only if the strip is designed for it. If you're not sure, ask the vendor for the cut sheet. Don't assume. I did, and it cost us a week and about $180 in replacement strip.

The decision that kept me up: retrofit vs. replace

I went back and forth between retrofitting the existing cans and replacing the whole fixtures. Retrofitting was cheaper and less invasive. Replacing gave us better control and a cleaner look. On paper, retrofit made sense for the budget. But my gut said we'd be back in the same conference room in three years.

We ended up doing a hybrid: retrofit in the offices, full replacement in the conference rooms and lobby. That decision came after I spent two weeks on the fence. Looking back, I should have run a small pilot first—one room, one driver, one control setup—before ordering for all three buildings. At the time, I was trying to save time. The pilot would have saved more.

What I'd do differently

If I could redo the project, I'd build a one-page spec checklist before getting quotes. It would include fixture, driver, control protocol, emergency module, downlight surrounds, trim, and cut requirements for any LED strip. I'd also ask every vendor to put exclusions in writing. Not because vendors are sneaky—most aren't—but because ambiguity is expensive.

I'd also loop in the electrician earlier. I treated them as installers, not as reviewers. They were the ones who caught the driver mismatch. Next time, they get the spec sheet before we place the order.

And I'd stop treating 'dimmable' as a single thing. It isn't. It's a promise that needs a protocol, a compatible driver, and the right controls. If a vendor can't explain that in plain language, that's a red flag for me.

Bottom line

A lighting retrofit is not just a fixture purchase. It's a system purchase. The Advance by Signify LED electronic driver, the downlight surrounds, the oprawy downlight spec, and even the question 'can you cut LED strip lights to size?' all connect. Miss one connection, and you're paying for expedited shipping and explaining delays to finance.

Transparency helps. Not just from vendors, but from me. I now tell vendors exactly what I don't know. I say, 'I'm not an electrician. I need you to tell me what I'm missing.' The good ones do. The ones who brush it off don't get the next order.

Prices and product details change. Verify current specs with the manufacturer or a qualified electrician before ordering. But the lesson doesn't change: ask what's not included, check the cut marks, and never assume a driver is just a driver.