I have Hella 500's on the front bumper, and some generic 80/100 halogen bulbs in the headlights. You can find the generic bulbs here: http://www.jcwhitney.com/productnoitem.jhtml?CATID=5229

I have still had no problems with the higher wattage bulbs. Note, these are not the "blue look, euro-look, laser blue, xenon-blue, super-white"... etc bulbs.

TimR

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