The first time, with Mini H1s. Probably a little over $300. That's for the projectors, bulbs, and new ballasts. I'm still using the relay harness that came with my old HID kit. My new retrofit with EvoX-Rs was around $600. That's for the projectors, Philips D2S bulbs, LED halo rings, premium shrouds, AMP to D2S adapters, and a fresh new pair of headlights to stuff all this into. I also had to custom make a relay harness that would plug into the DRL fuse slot with a fuse tap so my halos will function as my DRLs. Works great.