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

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WHICH 5mm leds ? It matters.

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

-max- (author)  steveastrouk6 years ago
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
-max- (author)  steveastrouk6 years ago
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.
qwerty156 -max-5 years ago
*140 lm/w at 1W
-max- (author)  qwerty1565 years ago
i dont think there that efficant, after all, quality cree 5mm leds are only 30lm per watt...
qwerty1565 years ago
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
-max- (author)  qwerty1565 years ago
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.