First off - these screw-in based bulbs do not work with a lot of microwaves. They did not fit mine (GE). I did plug them into a fixture to test brightness and they work fine. They also do not dim, and numerous microwaves offer different brightness settings. Again, if yours has adjustable lighting, these are not for you. On the other hand, if they fit your requirements you get a bright LED bulb that will use much less electricity and will last as long, or longer, than your microwave will.
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