I couldn't find the 9watt bulbs - got some 11 watters to try in the "horns". I wish there was a spot that told about the heat difference and what the lights could handle! I've been watching my front marker lights - I think as long as I don't sit and idle for a long time with them on - I'll be OK. I've done the "feel" test, and they're hot - but no damage yet. I figured if the bulbs burned the lens - I'd go ahead and get fogs or drivings lights - no probs yet!