Idea for Bathroom

I was on a road trip down to Las Vegas to see my sisters family. Along the way we stopped to use the restrooms as most people do and i was trying to come with ideas to rethink the bathroom. There are a lot of dumpy little restrooms so i had a lot i could work with. i didn't like touching things and like the hands free thing like sinks paper towels. So an idea popped into my head that this things use energy and i wasn't sure if they run off batteries or what but why not put little solar panels on them and reuse the energy already produced by the lights. let me know what you think of this idea. Greg Timothy i got the idea from those little calculators we all used in elementary.