This halogen light bulb can be used to light up the surface below your microwave or brighten the interior of the microwave once the door has been opened. If your light bulb is burnt out, it will not be able to do this, and will need to be replaced. Before you change the bulb, be sure to check that the light socket still works, as it may need to be replaced as well. This bulb is 25 watts, 120 volts, is sold individually and is a genuine OEM part. Remember to disconnect the microwave from the power source before you begin this repair.