Luminous efficacy - Wikipedia, the free encyclopedia
Category Type Overall luminous efficacy (lm/W) Overall luminous efficiency [note 1] Combustion candle 0.3 [note 6] 0.04% gas mantle 1–2 [14] 0.15–0.3% Incandescent 100–200 W tungsten incandescent (230 V) 13.8 [15] –15.2 [16] 2–2.2% 100–200–500 W ......