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5 mm led's 8 LUMENS PER WATT!?!?!? [answered] Answered

well i was thinking, 5mm LED's take about 1/10 of a watt, correct? 

and from this calculator found out Cree 5mm led's are .806 lumen's. i assume they are 1 tenth of a watt.

well, my calculator states they are 8 lumen's per watt (if i could run them at a watt.) 

i figure they are 1/10 of a watt because because this 500 led light makes takes about 50W as in the video and led's give less than a lumen of light.

so far, it seems leds just last long and emit blueish light.

is incandescent light better? with 20 lumens per watt from halogen?


WHICH 5mm leds ? It matters.

The Cree 5mm leds I just looked at are nearer w 30 lumen/watt


well, just general super bright white leds. like the ones on ebay. 10000 mcd 30 degrees

GIve me a link.

Cree is a superb state of the art/ leading edge, brand, ones on Ebay, not so much. Cree's researchers are some of the best in the business

i know. the amazing xml t6 is 100 lumen's per watt at 1000 lumen's, and 130 lumen's at 1 watt. it is also very small! but im just talking general super bright leds. eaby, superbrightleds.com, and radioshack.

i dont think there that efficant, after all, quality cree 5mm leds are only 30lm per watt...

it doesn't really matter what you think or not, the truth is that CREE XML U2 bin in cool white can easily achieve 140-150 lm/w when driven at 1 Watt

that's a power led, i have a few XM-L t6 1A led these are power leds, are not 5mm leds, 5mm leds are 0.099W about 1/10 watt at full power (30 ma @ 3.3V) and the 5mm cree led (hard to find on there site) says its 30 lumens per watt, but it dousnt even consume a watt.