luminous efficacy (lm/W): incandescent 15 halogen 18 fluorescent 60 LED 75 ------------------------------------------------------------------------------- Osram Classic 1386lm 77W 230V fr h Osram Classic 828lm 46W 230V fr h Voltolux (de) 806lm 8.5W 220-240V 2700K 50/60Hz 68mA cn LED Airam 806lm 9.5W 220-240V 2700K 50/60Hz 73mA LED Osram Classic 540lm 30W 230V fr h Osram 525lm 7W 220-240V 2700K 50/60Hz 44mA cn LED 1 Philips Classic 504lm 28W 230V 2800K h Megaman Spiral 500lm 8W 220-240V 2700K 50/60Hz 70mA f 1 Osram 375lm 5W 220-240V 2700K 50/60Hz 22mA cn LED e14 Rusta 150lm 2W 220-240V 2700K 50/60Hz 17mA LED e14 North Light Warmwhite 150lm 2W 230V 2800K 50Hz 43mA cn LED North Light 120lm 2.8W 220-240V 50/60Hz 13mA LED 2 North Light dec 1W 230V 50Hz 4.4mA LED 2 ------------------------------------------------------------------------------- Correlated Color Temperature (Kelvin): warm 2700K neutral 4000K cool 5000K https://dataswamp.org/~incal/data/LIGHTS