I've recently been using one of the 900 lumen flashlights (Aurora AK-P7-4 2 mode light) from DealExtreme strapped to the handlebars - works quite well, and while I've never run the battery completely down, I can get several days (nights?) of riding to/from work before I feel the need to charge the battery. (I only have a ~4 mile ride, one way.)
It does get warm, but not alarmingly so. (One of my cow-orkers has one of these lights he uses on his bike, and he rides a *lot* further than I do. He also uses the light for doing tunnel search-and-secures. He's never reported a temperature problem.)
Using the Aurora flashlight turned out to be much easier than building a light out of the emitters/drivers that I bought. (Which reminds me - are you still interested in a couple of those? I never sent them on, but it seems pointless now with the other choices available.)
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I've recently been using one of the 900 lumen flashlights (Aurora AK-P7-4 2 mode light) from DealExtreme strapped to the handlebars - works quite well, and while I've never run the battery completely down, I can get several days (nights?) of riding to/from work before I feel the need to charge the battery. (I only have a ~4 mile ride, one way.)
It does get warm, but not alarmingly so. (One of my cow-orkers has one of these lights he uses on his bike, and he rides a *lot* further than I do. He also uses the light for doing tunnel search-and-secures. He's never reported a temperature problem.)
Using the Aurora flashlight turned out to be much easier than building a light out of the emitters/drivers that I bought. (Which reminds me - are you still interested in a couple of those? I never sent them on, but it seems pointless now with the other choices available.)