Ummmm I feel stupid

Question

I was given an Emerson MW8115SS Microwave as a wedding gift 3 years ago, it works great and have no problems with it however the light bulb has burnt out and I managed to lose my owners manual between the 150 mile move we made. I am not sure what kind of light bulb it takes and how to change it. I have tried looking up an owners manual on Emerson's site but that model number doesn't bring anything up. I have only found it on sale at walmart. Hopefully someone can help a little bit. Thanks.