The halo's come on with parking lights & stay on the rest of the time. You have to do alittle bit of wiring for the halos and other lights but that part isn't to bad. The projector lights (low & high beam) take fog light bulbs. The other lights take regular blinker and sidemarker lights. I left the one bulbs on end unplugged so when the park lights are on there is no light on the end halo's cuz the very end sidemarker lights blink too.

Like DaNnYsEvEn says taking the bumper off is a pain in ass, what is the shittiest thing is that nothing ever fits back up the way it did before, well for me anyway im no body shop repair guy.