Alrighty, all finished. I have realized while installing the batteries and then installing the LED unit into the chest... that replacing batteries will be a nuisance. I will do additional Ultraman variants from the Netflix series and in those, I'll install custom LEDs and hardwire them with a switch like my Gundam Barbatos. This variant is going to stay as is... at least for now. It may end up being updated with better LEDs when I build the next one.
9 attached images. Click to enlarge.