The Microwave Halogen Light Bulb Is A Replacement Accessory For The Exterior Bulb That Mounts On The Bottom Of The Appliance To Illuminate The Cooktop. If Your Lower Microwave Light Is Burned Out You Can Easily Replace It With This Item. This Part Is A 25-Watt Bulb With A 2-Contact Wire Loop Base. Replacing This Accessory Will Require Basic Hand Tools, Minor Disassembly Of The Microwave And Novice Repair Experience. You Must Unplug The Microwave Or Shut Off The House Circuit Breaker For The Appliance Before Installing This Light Bulb.