Hey I'm back from SDCC! I used 2 SMD (surface mount) LED's on my HUD display. One in the center and one on the corner of the 1/4" acrylic. I used an exacto and lightly cut into one side of it and it lit right up! The LEDs are supposed to be running at 12Volts but I had them all running on a single 9v battery all weekend.
I met Jon Favreau a few times at the convention and also had the pleasure of meeting Tony that sculpted the prop as well as the ILM crew that made the CGI versions. ILM animators said there were actually several versions of the open blaster. If they needed an extra light glowing or something, they added it for that shot. It's all "alien technology!"
The movie is indeed AMAZING & is even girlfriend friendly! I told quite a few people about theRPF forums that were interested in making/buying a gauntlet, so if you were one of the many, sign up and say hi!
Pics coming tonight...