Dollar store. Not really any brand.. Lol
They worked well since they come with wiring, the reflector, the led, the switch, and the batteries, and are the right shape and size, the problems are that they eat batteries ( I bought 4 more book lights just to loot batteries from, 12 watch batteries for a dollar isn't bad) though it could be the poor quality batteries that makes it seem that way, only had one light run out so far. Also, I wish they were easier to turn on and off. I remember reading about someone using a soft switch from radio shack for lights on a helmet, that way they could use their tongue to turn them on and off. Wish mine was like that. I might change it yet.