They say something like 40 watts if i recall, but that sounds hight to me. you could try a couple 10 watt power resistors and just let em hang out while you test em. see if they get very hot. I beliebe something like 6 owm, so 10's would probably be fine. a couple 10 watt/10 ohm power resistors will cost you about a buch so they'll either work or give you an idea whether you need to go much higher as far as wattage. If you do need something on the order of 40 watts they then become sorta expensive, so some 10's would be cheap to try. whatever you get they will probably get hot to some degree so you'll wanna put them somewhere where they don't cause problems. of course you could also just use bulbs and have them stashed somewhere out of sight like the headlight shell.