HID vs LED vs Halogen Headlights in Projector Housings - YouTube
What Are Projector Headlights?
Projector Vs Reflector Headlight Best for LED, HID, Halogen headlamp? - YouTube
Amazon.com: 2.5 Inch Bi-LED Projector Lens,Car Headlight Retrofit Kit with Hi/Lo Beam,70W 20,000LM 6000K White,DOT Approved Focus Beam with Sharp Cut off Line No Blind Oncoming Car Upgrade Bi-Xenon Projector Lens :