wow, http://www.lupine.de , this company's 10watt HID(I know others make similar HID lights, but they gave specs) light has an output of 900 lumens. That is close to the low beam on a single automobile headlight. my car uses H4's and the standard bulb output is 1000/1650 lumens for the low/high beams respectively(keep in mind though that a car will have two headlights, so you have two sources, each with 1000 lumens output. even still this is bright for a bike(a standard automobile HID bulb, the D2S is a 35 watt xenon with an output of 3200 lumens).