Join Date: Sep 2005
Bikes: Windsor Fens, Giant Seek 0 (2014, Alfine 8 + discs)
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I think 10 watts is pretty much the standard HID. I have a Trailtech light, it's a 10 watt bulb (it says 13 watts, but apparently 3 of that gets burned by the circuitry). Yeah, it's bright. But it's not really all that much brighter than a 20W halogen at 14.4v. The self-contained bit is nice of course, but for myself I started with a batteryspace 14.4v bottle battery and a 20w halogen. I've been running with the HID for about 3 years now, but when it dies I'm just going to put a halogen back on.
I have a $25 2xAA LED flashlight from dealextreme which makes a great backup light. I've actually done my whole pitch black commute with it several times, but I prefer something a bit brighter for regular use.
Work: the 8 hours that separates bike rides.