White acrylic face Compound Lit Channel Letters
The difference between front-lit channel letters and compound channel letters is that compound channel letters are also reverse-lit. More specifically, the signs we make for Chronic Tacos are always compound channel letters with different colored LEDs in the back than in the front. The way we do this without having the different LED lights bleed into each other is by putting a thin piece of aluminum in each letter to section off the front and the back. The white LEDs to illuminate the faces are installed in front of the aluminum facing forward and the red LEDs are installed behind the aluminum and face the wall.