also, what's the difference between HID and Halo lights?
yes... Halo lights have 2 bulbs instead of one, and LEDs at the bottom most of the time. The term HALO means they have a dimly lit ring around the headlight bulbs, ie HALO But HALO lights are not HID (High Intensity Discharge) also the first gen of HID lights were called xenon (pronounced Zee Non)