Product review (1 stars): NOT A DUAL ELEMENT BULB 
If your microwave has a TWO POSITION light (meaning both bright & dim), this is NOT the replacement bulb your looking for. This is a single element bulb, you need a dual element bulb for a correct replacement.

I really cannot understand why appliance manufacturers seem to always incorporate a "special" or "unique" item that when it comes to having to eventually replace said item, it costs major  and an arm and a leg -or- you have to go to a special store to even begin to find the correct replacement part for even GREATER 

The wattage of this bulb is 10 watts higher than the original in my Maytag microwave (40 watts versus 30 watts), so understand greater watts = more heat, the lens covering the bulb gets EXTREMELY HOT, when the surface light is left on for long periods of time, it's hot enough to leave your finger prints behind (not a good thing).

This in my opinion could lead to the possibility of injury (burned) and the glass cover shattering if splashed with a liquid when your cooking.

Currently I'm looking for a dimmable LED replacement, that will not only operate cooler, and should last longer, but so far not much luck. I will update my review once I find one as the newer built in microwave units I have seen have LED bulb(s) installed for the surface light