I run 55watt but that is pushing it unless you get a high output stator. stock is 35 watt if you run 55 watt you want to keep rpms up when running them
You can probably get a 35 watt HID kit for the lights you got and you have to worry about stressing the charging system. If you know what kind of bulbs they take check HIDGEEKS.com they sell good kits for cheap that`s where I got mine and Ive had no problems.