Originally Posted by
sknhgy
You put the circuit board, and switch inside of the vistalite housing, then you mounted the LED outside so that it wouldn't overheat?
Yes, correct. LEDs are very energy efficient, but like all light sources, they still give off heat (not as much as halogen or HID). Every high powered LED lights designed on the market has some form of heatsinking so the heat will dissipate. The casing is plastic, if I had mounted the LED inside the housing, the LED will melt and destroy itself (it's really small, no place for the heat to run).
Regarding Vistalite, you will not find Vistalite brand anymore, but there are a lot of other companies with such similar (if not the same) LED blinkie as the Vistalite I have (they all come from the same factory, only different brand stamp and box). You don't have to use Vistalite. You can even go 2AAA style if the housing is big enough, but the runtime will be crap. Find yourself a 2AA blinkie case and tear it apart.
Originally Posted by
sknhgy
I think I can do this.
You can do this, it's a simple job. Even if you never DIY lights before, this is a great way to start.
If you like to learn more about this, hang out at Candlepowerforums.com or the bike light section at forums.mtbr.com. Bike light subforum at mtbr.com is great forum site for commercial and DIY bike lights.