I recently put in a PIAA 'Super White' headlight bulb, and WOW. The bulb has the same power draw as OEM, but throws a Lot more light. PIAA claims 100+ watts apparent from the 55 watt draw, and I'm inclined to believe them. Heat doesn't seem to be an issue, but I've only had a few rides since putting it in, so I'm not yet sure about durability. For what it's worth, I believe the HID conversions actually take less power than an OEM bulb, but it may or may not be possible to get them properly aimed in the housing.