Kostenloser Lumen-pro-Watt-Rechner
Berechnen Sie die Lichtausbeute in Lumen pro Watt. Vergleichen Sie LED-, Energiespar- und Glühlampeneffizienz.
Luminous Efficacy
80.0 lm/W
Formel
## Luminous Efficacy **Efficacy = Lumens / Watts** Higher efficacy means more light per unit of energy. ### Efficacy Benchmarks - Below 20 lm/W: Poor (incandescent) - 50-70 lm/W: Good (CFL) - 80-120 lm/W: Very good (modern LED) - Above 120 lm/W: Excellent (high-efficiency LED)
Lösungsbeispiel
800 lumens from a 10 watt LED.
- 01Efficacy = 800 / 10 = 80 lm/W
- 02Annual cost at 8hr/day: 10W x 8 x 365 / 1000 x $0.15 = $4.38
Häufig Gestellte Fragen
What is a good lumens-per-watt ratio?
For modern LED bulbs, 80+ lm/W is good and 100+ lm/W is excellent. The theoretical maximum for white light is about 370 lm/W.
How does efficacy save money?
A more efficient bulb uses less electricity for the same brightness. Replacing a 60W incandescent (14 lm/W) with a 10W LED (80 lm/W) saves 50W and about $22/year running 8 hours daily.
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