You should not go over the manufacturer standard wattage. The wires cannot handle that much current. That said, It sounds like you are expecting more of a driving light duty out of these rather than fog light. Have you tried re-aiming them?Does anyone know a really good brand of H3 style fog lights that are actually bright enough to make a difference? I'm having trouble as the ones I have bought are honestly dimmer than my nightlights in my hallways. They say 75W, but my marker lights are about twice as bright as these foolish bulbs. I bought Hella 75W halogens. Totally useless! There's no way they are 75W. I just stuck them in and secured the clip. I didn't think I put them in wrong... but who knows!