Love the spreadsheet in the OP, thanks so much! Do HID and LED both have essentially indefinite 'bulb' life (give or take accidents?) My halogen light has been going frequently, actually my current dead one lasted about the longest of all the bulbs over ~2 yrs, 60-80 hrs. I'm wondering about LED instead. I see the primo-er LEDs (Dinotte lithium 5 say) cost about the same as or more than HID though. Logistically, I'd rather not have to strap a battery to my top tube since it has wires on it. That seems to be an issue too.