I bought 2 really nice Halogens (Niterider Digital Evo for helmet and Classic Plus for handlebars) because I was told HID bulbs cost about $100 to replace should they break in a crash or whatever. Whereas halogen bulbs only cost $20 to replace. So, I spent the same amount of $$ on two halogens as what I would have spent on one HID. Granted the HID is brighter than a halogen, but my 2 lights throw out plenty of light to ride by.