The truth about LED's ?

HID's are more efficent, more light, better run time. In a few years an HID bulb could wear out from the number of hours or the number of starts, but they take lots of abuse, like 24 hour off road racing. The light is not ruined when the bulb wears out, you just replace the bulb.

See the first post in the thread "light selection guide" for more infomation and links to nightime beam photos of all kinds of lights. It has an excellent comparison of the pro's and con's of different bulb types.
There is even a chart that lets you compare price, run time, power, etc. of different lights.