[keenerd]

This is going to be a huge disappointment.

A mid range LED flashlight with a single CREE emitter will run for 10 hours on two AA batteries while putting out 50 lumens the entire time.

So we can guess guess the output of this bike light based on the batteries and run time. Works out to 15 lumens. Now that is pretty dim for outdoor use. Based on the 6 emitter design they would be using older Nichia LEDs. They may claim 40 lumens, but that will be on a fresh set of batteries. There will not be a regulator and after an hour it will be much dimmer.

Or (more likely) this guy has no clue what he is doing. Either way, it will still be a disappointment.

If you want a bike light that won't get stolen, buy a normal small two-AA flashlight and a flashlight mount. Unclip the light from the mount when you aren't on your bike and use it as a normal flashlight the rest of the time.