4 x Blue HID Hide-A-Way Emergency Hazard Warning Strobe Light Replacement Bulb Package Includes: 4 x replacement HID bulbs, 4 x extension cable Only compatible with our 120W and 160W HID Hide-A-Way system HID bulb lifespan of 8,000 hours Produces a very bright blue light Mounts onto any 1" hole in headlight, tail light, bumper lights, etc