What are P7 lights?

lovepasty Posts: 53
edited October 2010 in MTB general
After reading the various light threads, I've seen lots of references to P7 lights, I had assumed these were a brand or name of light but after googling/ebaying P7 there's a bewildering array of P7s

So I guess P7 is reference to the LED technology? Can anyone shed any light on this for me and explain what is good about them?

A link to a UK recommended supplier would be nice to :lol: