2 Inch Arc Reactor for placing in a super hero cake.
3 5mm LEDs with 3 x 220 ohm resistor in parrallel to a 9V battery.
White LEDs often have 3v forward voltage drop, so they need to be this way, rather than serial.
6 mm dowel is pushed into rear of cover to hold safely in cake.
Drawn up quickly in Fusion 360
Print as oriented, with raft, no support, 20% infill.