Starting a build

I just got a Knog Gekko rear light. Three bright LEDs and it hooks up to my seat post in a second. Looks good too, and just fine for even the most hostile London commute (like last night... grim). I'd certainly recommend them over the Frog for the extra bit of money.

The whole reason I like the Frog is simply the size, being able to carry them without noticing them in your pocket.