I have been given some super white 100 watt headlight bulbs, but was told that wiring may not be able to handle them, is this true, or are they safe to fit
They are illegal for road use and may attract some unwanted attention. I believe you are only allowed 55w which are what normal ones are. If you have higher wattage you will pull more Amps and risk your wiring.
basicly they must be e marked and same wattage as oem think they have to be 6000 kelvin or greater (basically daylight white) watch the solid blue tinted bulbs as they get over hot as the blue filter absorbs other wave lengths think black vs white t shirt in the midday sun