GE Microwave Oven Appliance Lightbulb 25W. Specialty Intermediate Base Bulb. T7 Bulb Type. E17 Base. Specialty bulbs from GE offer innovative solutions for a variety of lighting needs. Use specialty bulbs from GE for quality lighting everywhere! Appliance Lights from GE can be used in many household appliances such as microwaves, refrigerators and ovens. Be sure to check appliances for correct bulb wattage, voltage and base type. 800-GE-Light. www.gelighting.com.