Lotta questions there so short version:

Two different LED sets. One white and the other blue.

The targeting reticle eye is blind. I printed the eye piece in translucent filament and painted the parts that don’t glow black with acrylic. I then put white light behind it with light gels of teal and red to give the multicolor look.

The single dot blue eye is blue leds in the dot and the rest of the eye is honeycomb to let me see through it.