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09-30-08, 05:57 AM
Now that darkness is approaching, I'm _finally_ getting around to making some LED lights to go with my generator hub. In reading through the piles of materials (inkl. here (http://www.pilom.com/BicycleElectronics/BicycleElectronics.htm), for example), many/most/all of the LEDs that were specified were on the order of the ~70lumens @ 700mA variety.
But then digging through Cree's website, for example, I found what appeared to be much brighter LEDs, such as the MC-E (http://www.cree.com/products/xlamp_mce.asp) line, which are rated to 370 lumens at the same 700mA and 3.4V (with the same claimed thermal loss).
So, my question is, has LED technology taken a huge leap, or is there some reason that these LEDs aren't commonly used? Price? Heat? Durability?
What am I missing?
But then digging through Cree's website, for example, I found what appeared to be much brighter LEDs, such as the MC-E (http://www.cree.com/products/xlamp_mce.asp) line, which are rated to 370 lumens at the same 700mA and 3.4V (with the same claimed thermal loss).
So, my question is, has LED technology taken a huge leap, or is there some reason that these LEDs aren't commonly used? Price? Heat? Durability?
What am I missing?