Jukka] wanted a bike light that wasn’t afraid to go into the woods during the dark winter. He put together a lamp that uses eight 3 Watt LEDs to pump out 1680 lumens (english translation). The high power LEDs were mounted on a large aluminum heat sink and use lenses to optimize the beam of light. The system uses a 2 amp driver board that he assembled himself. Power is provided by sixteen AA Nickel Metal Hydride batteries that are housed along with the driver circuit in a water bottle.

This more than doubles the output of the last bike light we thought was too bright. Where will this lumen-arms-race stop?

[Thanks Sami]


http://hackaday.com/2009/10/22/unreasonably-bright-bike-light-apparently-hunts-deer/

That's ridiculous.  Night riding would be pretty cool though.

think about how cheap this is going to be when it's implemented in cars. why wouldn't they want to replace expensive and short-lived HIDs with inexpensive, long-lasting, and low power-consumption LEDs.