From what I understand about HID kits they take more power to "fire" them up but once they are running they only consume about 2/3 the power/current than it does to run your halogens. As far as 35w or 55w goes, unless youare running them in HID specific projectors 55w will blind the **** out of evryone on the road.35w is more than enough light in the road to make a huge difference over your stock or upgraded halogens. Some websites sell projector kits for a retrofit for HIDs and are relatively inexpensive. Check out theretrofitsource.com for projectors and kits or ddmtuning.com for HID kits(both vendors have a good record). Best of luck.