My daughter is going to college as a theatre major - and wanted some Source Four spotlights to decorate her dorm room. A string of fairy lights inserted into the back-ends of these lights make a pleasing display. I did 2 lights per Source Four (since there were 50 lights on a string) but you could do one.
Once the light is inserted - the cap is pressed on and you're done. The lights I used are these:
If you print the caps flat-side-down, and the light square-end-down you won't need supports.