Mr. Freeze looks cool whenever he appears in the Batman universe (yeah, I went there), but his best look is maybe in Batman: The Animated Series. Redditor ThunderMoustache replicated the costume and did so with incredible accuracy. He could easily be part of the animated universe. He used blue LEDs to add light in the helmet, the goggles, and the prop weapon. He says:
I drilled 3 holes in each goggle, big enough to let the LED’s heads through so that the wiring could be done on the outside. I also placed wax paper on the lens, so that it would have an even glow and frosted look. It’s impossible to see through them so when I wore it to Comic-Con they rested on my head, but I put them on for the shoot.