Luminous efficacy - Wikipedia, the free encyclopedia In SI, luminous efficacy has units of lumens per watt (lm/W). Photopic .... Light- emitting diode, white LED (raw, without power supply), 4.5–150, 0.66–22%.
LEDs Will Get Even More Efficient: Cree Passes 300 Lumens Per Watt 2014年3月27日 - LED maker Cree announced this week that it had achieved a new record in terms of lighting efficiency, harvesting 303 lumens per watt from a ...
