This weekend, from the bathroom of a friend of mine, in São Paulo. The light is to illuminate the shower. Just be sure it doesn't... y'know... fall into the shower and break the bulb and... y'know... electrocute you? Y'know?
Note the use of a screwdriver glued to a screw to hold the flapper in, a miscellaneous piece of rubber instead of a chain, and for the finale, a piece of cellophane to tie it together! 10/10 would stay at this hotel again.