As an upgrade to standard H6024 headlights, these Delta-Tech HI/LO headlamps with City Light option (AKA Daytime Running Lamps) feature a crystal lens, replaceable 60/55W H4 Xenon bulbs, a 5-yr manufacturer's warranty, are made in the USA & come in a kit which includes 2 complete light units with bulbs. Light measures 7in. in diameter. For a replacement H4 Xenon Hyper White 60/55 watt bulb order (80122).