You mean this line: So this is proof that leds are at the very best only 25% to 30% efficient? Just stop the insanity man. You made a dumb remark based on your incorrect assumption that 683lumen is 100%. Accept your loss and get on with it. You learned something. See that as a plus instead of making yourself look even dumber. Either way, you CAN run these leds at 40% efficiency up to 60%. So whatever we use is our own choice. Seriously, it cannot be hard to understand this concept. You being able to switch on your computer and all.