Subject line: "Lighting schedule update — bid due in nine days."
I opened it on a Monday morning. We were prepping a bid for a 32-room boutique hotel renovation: exterior walkways, a courtyard, and a two-story facade that would need accent lighting. The design team's spec called for Bega path lights and a series of LED spotlights. Not "or equal." Bega.
I'm the procurement manager at a 40-person electrical contracting company. I've managed our lighting and materials budget—roughly $600,000 a year—for 8 years, and I track every quote in a cost tracking system. So I didn't blink at the brand. I knew Bega path lights carried a specification-grade premium. What I did blink at was the number.
The Spec That Started It
The lighting package called for 40 Bega path lights along the walkways and 12 LED spotlights for the facade. A quick round of quotes through authorized Bega lighting distributors landed at about $14,200 for fixtures. Not awful, but not invisible either.
Then the GC called. "Can we substitute? We found a similar-looking path light at $9,800 for the package."
That's when the real work started.
Why I Almost Pushed Back on Bega Path Lights
Let me be honest: I almost pushed back on the spec. The equivalent generic fixture looked right in the photos. Same IP rating. Same cool-white option. Similar mounting details. For a line-item bid, the $4,400 gap was meaningful.
The upside of proposing the alternative was obvious: a leaner bid and a better chance of winning the project. The risk was harder to see. The architect had already built the drawing set around Bega path lights. If we submitted an alternative and the architect rejected it after award, we'd lose time, trust, and maybe the entire contract. I kept asking myself: is $4,400 worth potentially losing the client?
To be fair, the GC wasn't wrong to ask. The cheaper fixture might have worked on paper. But "might" isn't a procurement strategy.
What the cheaper quote missed
I did not rely on the photo sheet. I pulled the specifications from both manufacturers and set them side by side. The most frustrating part of the comparison was that the two fixtures seemed to check the same boxes at first glance. Same IP rating. Same Kelvin. Same cutoff claim. You'd think written specs would settle it, but they didn't.
What differed was the information behind the specs:
- The Bega quote came with photometric files, driver specs, and a warranty document we could attach to our bid file.
- The alternative required three phone calls just to confirm basic driver compatibility.
- The Bega path lights carried a system warranty that covered the integrated LED module. The alternative offered a fixture warranty with separate exclusions for "outdoor conditions."
- The specified fixture was listed on the DesignLights Consortium Qualified Products List. The alternative didn't appear there, which would have eliminated the utility rebate we'd planned for.
Those aren't line items. But they're costs.
How Many Watts Does an LED Bulb Use?
While all this was happening, the owner asked the question that comes up on every project: "How many watts does an LED bulb use?"
How many watts does an LED bulb use?
Short answer: a standard LED bulb in a household socket usually uses 6W to 18W. A 60W-equivalent LED is typically around 8W to 12W; a 100W-equivalent is closer to 14W to 18W. According to the U.S. Department of Energy (energy.gov), LED bulbs use roughly 75% less energy than incandescent bulbs and last up to 25 times longer.
But for this project, the wattage question was different. The path lights and LED spotlights weren't screw-in bulbs. They were integrated fixtures. The number that mattered was system efficacy: lumens per watt, plus the driver, plus the distribution pattern.
The Bega path light we spec'd was around 10W per fixture. The generic alternative was listed at 14W. That 4W difference—over 40 fixtures, running roughly 10 hours a night—adds up to 584 kWh per year. At commercial rates around $0.13/kWh in 2024 (Source: U.S. EIA), that's about $76 a year, or $760 over a decade. Don't hold me to the exact rate—it varied by month and tariff—but $0.13 was close enough for a bid decision. Not a fortune. Enough to matter when you're comparing a $4,400 gap.
LED Spotlights Followed the Same Math
The facade LED spotlights were fewer but higher-wattage fixtures. The spec'd LED spotlight was listed at 18W; the alternative at 24W. The difference across 12 fixtures was smaller in dollar terms, but the operating schedule was longer because the facade lights ran dusk to dawn: about 315 kWh per year, or roughly $410 over a decade. Combined, the energy gap was around $1,170. Real, but not enough by itself to justify the premium.
What pushed the decision over the line wasn't watts. It was warranty, documentation, and the cost of being wrong.
Total Cost, Not Unit Price
I built a TCO spreadsheet. Not a complicated one—just 10 years, 3,650 hours/year, energy use, estimated maintenance, replacement risk, and the probability that the architect rejected a substitution.
After 10 years, the Bega package still cost more: about $3,200 more, not $4,400. The energy savings closed part of the gap. But the cheaper alternative didn't lose on paper. It lost on risk.
If the architect rejected the substitution after award, the rework—reordering through authorized Bega lighting distributors, waiting for delivery, redoing the install—would cost us an estimated $7,500. I assigned a 40% probability to that rejection. That's an expected cost of $3,000. Now the gap was under $300, before factoring in the value of a spec-grade light fixture with complete documentation.
At that point, the decision was clear. Put another way: the risk-adjusted total cost made the Bega path lights the rational choice.
What I'd Do Differently
So glad I ran the numbers before rejecting the spec. Almost submitted the generic path light as a value-engineering item, which would have triggered a substitution meeting with the design team. We'd have probably won that argument, but "probably" is how rework starts.
Actually, if I could go back, I'd call the distributor earlier. I've worked with Bega lighting distributors before—well, with two of them regularly—but only one of the three I contacted pointed out that the step-light series was better suited for one part of the courtyard than the path light we'd been spec'd. That kind of advice saves time. A vendor who says "this isn't our strength—here's who does it better" earns my trust for everything else. At least, that's been my experience on specification-driven projects.
If there's one policy I've added since then, it's this: no substitution goes into our value engineering list until it has a TCO line and an approval risk note.
A few lessons I'd pass along:
- When someone asks "how many watts does an LED bulb use?", answer the fixture-level question too: total system wattage, operating hours, and replacement strategy.
- Price the fixture, then price the documentation. If a manufacturer can't provide photometrics and driver specs, budget for the risk.
- Don't substitute a specification-grade fixture just to close a bid gap. Run the TCO, assign probabilities, and make the call with your eyes open.
We submitted the bid with Bega path lights and the LED spotlights as specified. We didn't win the project, as it turned out—but not because of lighting. A month later, the GC asked us to handle a smaller lighting retrofit at the same property. The spec listed Bega path lights again. That time, the price felt easier to explain.
At least I didn't start that relationship with a substitution argument. Dodged a bullet, even if the first bid didn't break our way.
Prices and utility rates referenced here come from our internal bid file and the U.S. EIA's 2024 commercial electricity data. Verify current pricing and rebate requirements with your local Bega lighting distributor.