This lamp is designed for an LED "puck" light. Battery operated lights are about $4 each; simply do a web search for "puck light". This blog page tells where you can get wall pwered lights that work very well: http://birkbinnard.com/blog/wall-powered-led-lights/.

This print took 21 hours 2 minutes at a print speed of 100 mm.sec and layer height of 0.400 mm. It uses the same basic design as https://www.thingiverse.com/thing:2484050 so it may be that you have to use the Slic3r slicer to slice it. For details why this is the case see that page or, for more information, this one: http://birkbinnard.com/blog/do-the-twist/.