I am a HUGE fan of the Photon Micro Light www.photonlight.com but they are kind of pricy for what they are.

I recently found a site that sells rip-off photons for really cheap.

Like $.47 a peice SHIPPED! I just got a 10 pack for less than 5 bucks and I'm impressed. The quality isn't as good as the photons, but they are equally bright, and I actually prefer the beam angle to the more expensive photon.

http://www.dealextreme.com/details.dx/sku.1253

Just thought I'd share. Great for the keychain, hunting vest, tackle box, glove box, SHTF/ZRT, great gifts.

It's a no-brainer.