Every January, I do the same thing. I export every lighting invoice into a spreadsheet and sort by vendor, fixture type, and failure rate. Last year, that spreadsheet told me something I didn't want to hear: we spent 18% more on lighting than I had planned, and most of the overrun was in replacement labor.
I'm the procurement manager at a 28-person commercial greenhouse. Over six years, I've signed off on roughly $180,000 in lighting spend. I've negotiated with more than a dozen vendors and built a cost tracking system that flags every hidden line item. So when someone asks me to compare Gavita LED fixtures against traditional Gavita bulbs, I don't start with PAR charts. I start with the invoice.
This article puts a spotlight on the comparison that actually matters: Gavita Pro RS 1900e LED vs. Gavita bulbs. Not which one is 'better' in a marketing sense. Which one costs less over five years, including the stuff nobody quotes.
Why This Comparison Matters
Here's the thing: if you compare sticker prices, you'll miss the real story. The LED fixture costs more upfront. The HPS system may look like a bargain until you calculate replacement lamps, extra electricity, and the labor hours you'll never get back. A comparison-driven approach keeps the numbers in view.
I'm not here to tell you Gavita is perfect. I'm here to tell you what the financial breakdown looks like when a procurement manager runs the numbers.
The Framework: TCO, Not Sticker Price
I compare every lighting option across four dimensions:
- Upfront cost per fixture
- Energy use and replacement cycle
- Installation, accessories, and hidden fees
- Heat and light quality in your actual space
If a vendor won't quote all four, that's a red flag. The supplier who lists every fee upfront—even if the total looks higher—usually costs less in the end.
To be honest, I only believed this framework after ignoring it once and eating a $1,200 mistake. The 'cheap' HPS quote didn't include the socket adapters or the rewiring labor. That was the year I built a TCO spreadsheet.
Dimension 1: Upfront Cost
In Q2 2024, I priced two options for a 20-fixture greenhouse bay. The Gavita Pro RS 1900e LED came in around $1,050 per fixture with hangers. The HPS setup with a 1000W DE fixture, ballast, and reflector cost about $600. Then I added two spare Gavita bulbs at $80 each, bringing the package to $760 per position. So the LED premium was $290 per fixture. On 20 fixtures, that's $5,800 more upfront.
No surprises there. LEDs are still expensive.
Dimension 2: Energy and Replacement Costs
This is where the math flips.
The 1000W DE HPS fixture draws about 1,080 watts with ballast losses. The Gavita Pro RS 1900e LED draws 645 watts. At $0.12 per kWh, running 16 hours a day, 365 days, the annual cost is:
- HPS: 1.08 kW × 16 hr × 365 days × $0.12 = $756.86 per year
- LED: 0.645 kW × 16 hr × 365 days × $0.12 = $452.02 per year
That's a $304.84 saving per fixture every year. On 20 fixtures, that's over $6,000 annually. Period.
Then there are the Gavita bulbs. HPS bulbs degrade. We replace our Gavita bulbs once a year in commercial operation because light output drops before they burn out. At $80 each, that's $80 per fixture per year. Over five years, that's $400 per fixture just for lamps—plus the labor to change them. The LED has no bulb replacement. Five years of no lamp changes is worth more than the spec sheet suggests.
By the way, per FTC guidelines on environmental marketing (ftc.gov), 'energy saving' claims have to be substantiated. That's why I always ask for the input wattage and the manufacturer's spec sheet before I trust a payback estimate.
Dimension 3: Installation, Accessories, and the Fees Nobody Quotes
Last year, we ordered a custom chandelier sign for our customer lounge. The quote looked clean. It didn't include the dimmer, the transformer, or the hanging hardware. Those extras added 18% to the final bill. I should have known better. I built our procurement policy around 'what's NOT included' because I got burned twice on exactly this pattern.
If you've ever watched a tutorial on how to install outdoor recessed lighting, you already know the pattern: the housing and trim are sold separately, the wire connector kit costs extra, and the old junction box may not be up to code. HPS grow lighting is the same, just with a ballast instead of a transformer.
For HPS, you need high-temp wiring, socket adapters, a new breaker in some cases, and ventilation for the heat. For the Gavita Pro RS 1900e LED, you need to check the input voltage range. I dodged a bullet in 2024 when I double-checked a quote before ordering. The sales order had 208V fixtures, but our line was 277V. One click away from a $6,000 mistake.
Similar story with verbal promises: I skipped the written confirmation because we'd used the same vendor for years. That was the one time the verbal agreement got forgotten. $800 of unplanned labor.
Here's the rule: if the quote doesn't list every connector, hanger, and adapter, assume it's not included. Then ask for the total. The vendor who says 'you'll need X, Y, Z' before the invoice earns my trust.
Dimension 4: Heat, Light Quality, and the 'Free Heat' Argument
This is where HPS can still win.
HPS produces a lot of infrared heat. In a greenhouse that's already cold, that heat offsets natural gas costs. I've run the numbers: if you're heating a greenhouse from November to March, the thermal output of a 1000W HPS can be worth $50 to $100 per fixture per winter, depending on your fuel price. LED runs cooler, so you'll need to make up that heat elsewhere.
In a sealed environment with dehumidification and cooling, that heat is a liability. But in a cold greenhouse, it's a line item you can't ignore.
Light quality? The Pro RS 1900e LED has better spectrum control and dimming. The Gavita bulbs have decades of proven output. But 'better spectrum' doesn't pay the bill if it forces you to install more heaters. This is the dimension where the 'correct' answer depends on your climate and your crop.
What I'd Choose—and Why
If you're outfitting a new facility and you can cover the upfront cost, the Gavita Pro RS 1900e LED is a no-brainer for energy and maintenance. The five-year TCO is lower, the replacement costs disappear, and the labor savings are real.
If you're retrofitting a greenhouse with existing HPS infrastructure and you rely on the waste heat, keep the Gavita bulbs. Just budget for annual lamp replacement and rising electricity rates. And get the hidden fees in writing.
Bottom line: the LED wins on energy, maintenance, and total cost over five years. The HPS wins on upfront price, simplicity, and free heat. There is no universal winner—only the option that fits your building, your utility rates, and your tolerance for surprise invoices.
Take it from someone who compares 8 vendors every year using a TCO spreadsheet: the best deal is the one where every line item is visible before you sign. That's the deal that keeps my January audit boring. And I like boring.