I have created a LED Spotlight for Mendel90. It is supposed to be screwed to Nopheads LED rpi_light_clamp.stl which can be found in his Github, Fits for 30mm Dia LEDs like http://www.banggood.com/G4-7W-30COB-LED-Warm-WhiteWhite-Light-Bulb-Lamp-DC-12V-p-1001448.html Pins have to be removed and replaced by wire.

Power LED with 11V max because they are getting very hot otherwise.

Attribution - Creative Commons

Mendel90, LED