I have printed these ones with the shorter version and added some high-power RGB LED to it and build a Arduino based DMX slave with three N-Channel mosfets at 2.7 Volts for the LEDs. The spotlights are made with white PLA and then painted black and added some Aluminum tape inside to prevent light bleeding thru the PLA. I have made over ten spotlights and controllers and they are controllable like normal "big ones" RGB spotlights. So now i have great mini stage with a professional lightshow. THANK YOU SO MUCH FOR THE MODELS!