LED payback period calculator

LED payback depends on three things: the electricity savings per fixture, how many hours per day they run, and the upfront LED cost. A 60W-to-9W LED replacement at 8 hrs/day (US average rate) typically pays back in 3–8 months. High-runtime commercial fixtures like warehouse high bays often pay back in 12–18 months even at higher LED prices.

Under 12 months is excellent for any lighting upgrade. 1–2 years is strong — most capital investments accept a 3–5 year payback, so 1–2 years for lighting is significantly better than average. 2–4 years is moderate but still justified given the LED’s 15–20 year lifespan. Payback over 4 years is slow and suggests either low electricity rates, low runtime, or expensive fixtures.

The payback period per fixture stays the same regardless of quantity — but the total investment and total return scale together. Replacing 60 troffers vs 1 bulb has the same payback timeline, but the 60-fixture upgrade represents a much larger absolute saving: a warehouse spending $8,000 on LED high bays might save $14,000/year after payback.

For commercial applications, yes — maintenance savings often shorten effective payback by 20–40%. A 400W metal halide lamp lasts ~15,000 hours; an LED equivalent lasts 50,000+ hours. In a warehouse with scissor lift access at $75/change, you avoid 3+ changes per LED lifetime, saving $225 per fixture in labour alone before accounting for bulb cost.

Fastest payback typically comes from: 24/7 or long-runtime fixtures (parking lots, exterior security, warehouses), high-wattage replacements (400W metal halide → LED), and locations with high electricity rates. Residential bedroom lamps running 4 hrs/day are the slowest payback — though still worthwhile over a few years.