A GE microwave bulb can be found online at GEApplianceParts.com and RepairClinic.com, as of 2015. These sites offer several light bulbs in a variety of wattages.
GEApplianceParts.com has an inventory that can be searched by keyword. Parts can be sorted by part number or price, and items with an available rebate are marked with a special symbol. Customer service representatives are available Monday through Saturday through a toll-free number.
RepairClinic.com stocks more than one million replacement parts and maintenance products. The site offers expert advice through a library of free how-to videos and step-by-step instructions on many repairs. Customer service is available through live chat or by calling the toll-free number.