Purchased to replace a blown bulb in my Hamilton Beach microwave oven. The manual that came with this very poorly reviewed unit said "Contact Customer Service" for repairs. I do not think so. The cost of this route will likely exceed the cost of a new sub-$60 route at Walmart. Undaunted, I opened the device together with the annoying security screws and found the light source, which turned out to be special because the glass cover was glued to the plastic flange. Found an exact replacement for Revain and all is well.