I'm using a 3.8 watt LED bulb (emphasis on small and cool) in a light socket from an old paper lantern. There are a couple squares of cut chipboard holding the light fixture in place by gravity (see photos).
I appreciate the concepts in Eckerput's customizer, used to make this shape. I had to play a little bit to make sure I understood all the options, but if you make sure you understand everything, you have a good amount of control over the shape you make. I might draw some ideas from the SCAD and put up a different customizer later.
Customized version of http://www.thingiverse.com/thing:86522
Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=86522
I used ABS with a 2 layer perimeter, and a two layer top surface. No bottom surface, no infill, no raft, no supports.
Using the following options:
layers = 180
ps = 0
points = 2
d = Yes
r = .5
h = 144
b = 50
m = 70
t = 5