U-H3-100W Bulb is standard replacement bulb for a U-7682 100 Watt Halogen Lamp. If the lamp burns out just the bulb can be replaced instead of the whole unit. The U-7682 lamp is used in our 330 series 100 Watt H3 Halogen spotlight. There is also a Ford specific replacement bulb U-H3-100W-B used on for halogen lights installed at the Ford factory.