I tried a bulb purchased locally. These burned out very quickly. My husband bought two more locally. I told him they would not work. I went online with the model number of my microwave. I selected the AppliancePartsPros.com website. I entered my microwave model number and the bulb loaded for purchase. I ordered two bulbs for the microwave since it has two lights in it. The shipping was very fast. The bulbs are perfect! They are obviously good quality bulbs and the exact ones for this mircowave. I highly recommend AppliancePartsPros.com for all of your appliance needs.