The light in the bathroom of our 21 is behind you when you are looking in the mirror and so your face is in shadow. This bothered me every time I shaved so I headed to Home Depot to look for a solution. I ended up buying two of this battery powered led light and mounted one on each side of the mirror using the included double sided tape. They are not water proof or resistant so one must be careful when using the shower but other than that they work great and I can finally see my face. My wife loves them for putting on makeup.