Rode down to Reynolds last night, and while I was sitting in the staging lanes, I overheard two guys talking in a civic next to me. They were discussing how headlamp wattage reflects horsepower. Apparently if you have your headlights on, and the bulbs are 150 watts or higher, it will rob you of some horsepower and make your car slower.
I must say....... I've been to three world's fairs, and a goat ****ing, and I've never heard anything like that.