Luminous Efficacy | JDRM Engineering, Inc.
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Efficiency of LEDs: The highest luminous efficacy of a white LED. - DIAL
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Inside Innovation: Philips breaks 200 lumens per watt barrier
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HID vs. LED Grow Light Comparison - California LightWorks
lumens per watts, for LED lamps, Gooseneck LED lamp, LED lamps
What is LED Efficacy? - LED Direct
LED lighting efficacy: Status and directions - ScienceDirect
Types of lamps - Electrical Engineering Centre
