Any 7" car lamp --- now old styyle--- will fit especially the H4 types for an easy upgrade. If you can get hold of an SEV Marchall (dont know if they are still made or not) it has two seperate bulds for head and dip and with a small amount of modification you can fit 100w bulbs! ALSO if you wire the dip to the front park light wire (brown and white) that you US people dont use you will get BOTH bulbs on on main! NOT recommended without relay switching and, of course, the generator struggles somewhat but you should see peoples eyeballs melt if they upset you!