Originally Posted by Becca
I'm in the process of re-doing my bike's lighting system. It'll be the third time I've done it. I'm using a Luxeon 5W bulb for the headlight. As I get the parts in and start working on it, I'll take pictures and post them.
Don't discount the 3W bulbs completely, I found that using two 3W LEDs was actually a better solution than a single 5W LED. This is mostly because a 5W LED was more than twice as expensive as a single 3W, which meant I could implement a dual-beam 6W headlight for less than a single 5W. Also remember that the 5W LED will get much hotter than a 3W, so you'll need at least 60% more square inches of heatsink.