I am impressed. I followed the advice given here and built my own light system. It is blinding. I used a 12 volt lead sealed acid battery 5Ah, a 12 volt 50 watt outdoor spot light (the lawn and garden type), made a case out of pvc pipe fittings, used the wiring and the switch that is recommended for the power source I am using and lots of electrical tape.

When my wife saw me coming home, she mistook my bike for a motorcycle. It is much better than the led light that I bought at walmart. Only problem is the heat that the bulb generates. Do you think I can get the same brightness or improve the concentration of light into a narrower beam with a smaller watt bulb?