This a pair of round holders for this LED RGB rings that I mounted into a pair of welding googles as a Halloween project. One ring has a square support for a small 110mAh battery that I kept from an old toy. The battery is connected to a lipo battery charger that I got here. The other ring holds an attiny85 that I programmed to run some combinations of the lights. I Made the layer thick enough so I could still have the round glass on the outside.
My build was based on the Adafruit Project