With ability to run for 4,728 hr in twin 6 Vdc battery-powered flashing road light, Series BRA304 has quick disconnect type T 3 1/4, 9 mm single-contact bayonet base that mounts directly into hazard roadside flashing light socket. LED can light up at 4.2 Vdc with optimal light output at 6 Vdc. It is made of four 5 mm, 595 nn peek wave yellow LEDs that are positioned to work with reflectivity prismatic lens in standard hazard roadside flashing light.