I saw those as well, didn't look like they would be worth the money to me. I could understand wanting a bit of light at times, but in the shop I have drop lights that take care of that problem. I can see how they would be nice in a tool kit for the road, but without a way to keep them charged the lights would be dead when you needed them anyway. If the charger would plug into 12v then they might be more useful.
And the light settings were strange. I can understand the low and high setting, but the need for a flashing light escapes me. I can just imagine trying to work on a car in the dark alongside the road with a wrench who's light is flashing on and off. Talk about distracting.