They light up even the darkest of closets and cupboards.  The back comes off very easy to change the batteries.  You can either use the included remote or simply push the front of the light and it comes on.  Very easy to use and very well built lights.  I put one of these in a cupboard today because it is a deep cupboard and I can't ever see anything.  Once I put one of these lights in there and turned it on the whole cupboard was lit up - all 3 shelves!!