VeggieCycle writes – “Most good rechargeable tungsten halogen Bike Lights that put off a good deal of light (200 to 600 lumen) cost a ton of money 75 to 200 bucks. I took my really expensive light apart and found that its just a bulb you can buy anywhere for $ 4.00 and some rechargeable batteries. So heres a CHEAP way to build your own with part that you can get from Home Depot (mostly) This is a no frills light. I didnt put a switch on this one. I have been adding switches to my new ones.”Link.