Originally Posted by
zacster
There is no way that is 600 lumens. The LEDs you are using both produce under 100 lumens per watt, and a dynamo only produces 3 watts. It can still be plenty of light, and brighter than anything I usually see.
It'll be at least another year before we can get a 600 lumen light from a dynamo. Cree is still working on it. When they do get 200 lumens per watt, it'll change the way we do lighting as these will be the most efficient lights around and will replace CFLs in the marketplace. Right now it is still somewhat of a tie.
The electronic I'm using puts out 7 watt, not 3.
http://pilom.com/BicycleElectronics/DynamoCircuits.htm
That puts the wattage per led at 1.75 each, based on the spec sheets from cree, that's an average of 180 lumens per watt, theoretically 720 lumen, but accounting the real world loss from optics and whatnot, 600 lumens.
I have another 6 cree xpg gen 2 lights to post soon, and it's definitely not 3 watts and definitely more than 1000 lumens.
Inspired by this from ktronik at mtbr.com
http://forums.mtbr.com/lights-diy-do...iy-413443.html
That's 5 years ago using Cree XR-Es.
Mine will be a lot less clunkier.
Dynamo can definitely put out more than 600 lumens, commercial lights like Supernova E3 triple puts out 800 lumen.