Acrylic channel letters are the large, often illuminated letters you see on building exteriors and storefronts. They are built for one job above all: being read clearly from a distance, day or night. When a business needs presence on the outside of a building, channel letters are usually the answer. Here is how they are built, lit, and sized.

How a channel letter is built

Each letter is its own shallow, three dimensional housing. It has a face, usually an acrylic panel that the light shines through, sides known as returns, and a back that holds the LED modules and wiring. This construction is what lets each letter glow evenly and stand up to the weather.

Illumination options

There are three common approaches. Face-lit letters glow through the acrylic face for maximum brightness and are the classic storefront look. Halo-lit, or reverse-lit, letters are lit from behind so the light washes onto the wall for a softer, upscale outline. Combination lighting does both. The right choice depends on the building, the brand, and how much attention the sign should command.

Why the acrylic face matters

The acrylic face is what carries the color and spreads the LED light into an even glow without hot spots. Colored or printed faces let the letters read as brand colors both lit and unlit, which keeps the sign on-brand during the day as well as at night.

Sizing for viewing distance

Letters need to be sized for how far away people will read them. As a rough guideline, every inch of letter height gives about ten feet of readable distance, so a sign meant to be seen from across a wide road or parking lot needs substantial letter height. We size letters to the building and the sight lines.

Permitting and code

Exterior illuminated signage is usually regulated. Many locations require a permit, and electrical signs often need to meet safety-listing standards. Landlords and municipalities may also set size and placement rules. It is worth confirming the requirements for your address early, since they affect design.

Built to last outdoors

Exterior signage takes sun, rain, and heat year round. We build channel letters with UV-stable acrylic faces and weather-resistant construction so they resist fading and cracking and keep performing through Florida conditions, with efficient LEDs that run for years.

Frequently asked questions

Face-lit or halo-lit, which is better?

Face-lit is brighter and more attention-grabbing; halo-lit is more refined and upscale. The best choice depends on your brand and building.

Do I need a permit for channel letters?

Most exterior illuminated signs require a permit and sometimes a safety listing. Requirements vary by city and landlord, so confirm for your location before production.

How long do the LEDs last?

Quality sign LEDs are rated for many years of continuous use and are far more efficient than older neon or fluorescent lighting.

If you are planning exterior signage, share your location and logo and we will help you spec letters sized, lit, and built for the space.