Visible by day, luminous at night, channel letters provide great depth and precision to your company’s sign. Channel letters are also known as “internally illuminated letters”. This description says it all in that each letter is generally lit from the inside with light shining through the plastic sign face or out the back of the letter (called a halo-lit, or reverse channel letter). As is the case for most of the signs we offer, channel letters are custom made from metal and plastic, and are commonly illuminated with LED lighting (very efficient) or neon tubing.