My wonderful husband, as seen there on the right, wired up Otachi's lights for me a few days ago! He worked VERY long and hard to get it all to work. This photo was taken WITH a flash and her lights are still so bright. Her tongue is blue UV reflective tongue from DVC which is why it's glowing so intensely. Otachi has 4 blue LEDs and one black lights LED on the roof oh her mouth. The light does't penetrate the tear duct vision (thank goodness) but her nose vent...thing does light up a bit. Not a total disaster.
Sadly, We could not get her eyes to work. I had gotten a faulty paid of LED eyes. I tested them before installing them, but with only a few times turning them on after installation, the diode slowly died into nothingness. Her eyes are sculpted in and to remove the eye would require me to scrape off half her face. Not happening! The diode is forever infused into the resin eye and cannot be removed. We thought we might be able to place a cluster of LEDs (about three) behind the eye where there was a gap left for the wire but sadly the gap wasn't big enough to allow enough light through to light the eye as much as the other (have one more dim than the other just looks derpy). We might be able to chisel out a larger gap later on, but it required taping up otachi to avoid dust particles as well as some precision and we just don't have time for that stuff before Anime Boston on April 3rd. She may yet have light up eyes, but not this time around.
Once more, this mask was created off a round nose dragon blank by DVC with some seriously hardcore alterations which you can follow along with in my gallery