[nixiebunny]

What he said! It gets warm because it's a polyester lab coat with another layer of plastic insulation. The whole thing dissipates 100 W, which is about 20 milliwatts per square inch.

I wrote a bunch of VHDL code to convert digitized video to RGB pulse width modulation for the LEDs. It works just like the billboards, but thinner.

I wouldn't mind spraying some conformal coating on it to make it water resistant. I'll have to ask my friend who works at an LED billboard company for recommended products.