these are pretty cheap and take a week or two to get here from asia but man are they really really bright, did I mention cheap. of couse you will need a mounting bracket also.
http://www.ebay.com/itm/CREE-LED-7W-...item3cc8ba95b2
http://www.ebay.com/itm/Bike-Front-H...item3378b2a534
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2010 Kestrel RT900SL, 800k carbon, chorus/record, speedplay, zonda
2000 litespeed Unicoi Ti, XTR,XT, Campy crank, time atac, carbon forks