Bike LED Lighting system

the author writes: First, the rationale: I don’t want lights on my bike because they’re theft magnets, are more fragile, and more cumbersome. I want a single battery pack that powers a tail light and one or two headlights, and I want to turn it all on or off with one switch. The backpack is the best way to go for me, since I also like to carry my lock in the backpack anyway and always have it with me.

Bike LED Lighting system: [Link]