The Whirlpool W10709921 Microwave Light Bulb is an essential component manufactured exclusively for microwave ovens. This bulb functions as the main light source inside the microwave cavity, ensuring visibility both during cooking and inspection. It emits light when power passes through its filament, the same as other incandescent light bulbs. This replacement bulb enhances user conve... https://www.hnkparts.com/w10709921-whirlpool-bulb-light