What are channel letters?

Channel letters are three-dimensional individually cut letters or shapes, typically illuminated with LEDs, commonly used for storefront and building signage. They can be front-lit (face illuminated), back-lit/halo-lit (light shines behind creating a glow), or combination lit. Channel letters are the most popular choice for retail storefronts and commercial buildings.

What is a monument sign?

A monument sign is a freestanding ground-level sign that sits directly on the ground or on a low base. Monument signs are typically used at building entrances, corporate campuses, HOA communities, churches, and schools. They create a professional, established appearance and are often made from materials like stone, brick, aluminum, or foam with stucco finish.

What is the difference between a pylon sign and a monument sign?

The main difference is height and mounting. Pylon signs are tall signs mounted on one or more poles, designed for visibility from roadways and highways. Monument signs are low-profile ground signs that sit at or near ground level. Pylon signs prioritize visibility from a distance, while monument signs prioritize aesthetics and a professional ground-level presence.

What is ADA compliant signage?

ADA compliant signage meets Americans with Disabilities Act requirements for accessibility. This includes tactile (raised) letters and numbers, Grade 2 Braille, specific color contrast ratios, non-glare finishes, and proper mounting heights (typically 48-60 inches from floor to baseline). ADA signs are required for permanent rooms and spaces in public buildings.

What is wayfinding signage?

Wayfinding signage is a coordinated system of signs that helps people navigate through buildings, campuses, or outdoor spaces. It includes directional signs, identification signs, informational signs, and regulatory signs. Effective wayfinding reduces confusion, improves visitor experience, and is essential for hospitals, universities, corporate campuses, and large retail environments.

Sign Glossary | Terms & Definitions

A

ADA Signage

Signs that comply with the Americans with Disabilities Act (ADA) requirements for accessibility. ADA compliant signs include tactile (raised) letters and numbers, Grade 2 Braille, specific color contrast ratios (70% minimum), non-glare finishes, and must be mounted at specific heights (typically 48-60 inches from floor to baseline of text). Required for permanent room identification in public buildings, including restrooms, exits, and room numbers.

Awning Sign

A sign integrated into or printed on a fabric or metal awning that extends from a building facade. Awning signs serve dual purposes: providing brand visibility while offering weather protection for entrances and windows. They can feature printed graphics, dimensional letters mounted to the awning face, or illumination from within. Common materials include canvas, vinyl, and aluminum.

Aluminum Sign

Signs made from aluminum material, valued for their durability, light weight, rust resistance, and ability to hold paint well. Aluminum is commonly used for panel signs, dimensional letters, and sign cabinets. It can be finished in various ways including painted, anodized, or brushed.

B

Blade Sign

A sign that projects perpendicular from a building facade, designed to be visible to pedestrian traffic walking along the sidewalk rather than approaching from the front. Also called a projecting sign, flag sign, or hanging sign. Blade signs are popular in downtown districts, shopping centers, and areas with heavy foot traffic. They often feature decorative brackets and can be illuminated.

Backlit Sign

A sign that is illuminated from behind, causing light to shine through translucent panels or around opaque elements. Backlit signs provide excellent visibility at night and create a professional appearance. The light source is typically LED modules positioned behind the sign face.

Box Sign

See Cabinet Sign.

C

Cabinet Sign

Also called a box sign or lightbox, this is an enclosed sign with an internal light source and translucent face displaying graphics or text. The entire sign face illuminates when lit, providing high visibility. Cabinet signs are commonly used for shopping center tenant signs, gas station price signs, and building identification. They consist of an aluminum or steel frame, translucent acrylic or polycarbonate face, and internal LED or fluorescent lighting.

Canopy Sign

Signage attached to or integrated with a permanent canopy structure extending from a building. Unlike awnings (which are typically fabric), canopies are usually rigid structures made of metal, wood, or other permanent materials. Canopy signs can include mounted channel letters, printed graphics, or illuminated panels.

Channel Letters

Three-dimensional individually cut letters or shapes, typically illuminated with LEDs, commonly used for storefront and building signage. Channel letters consist of aluminum returns (sides), an aluminum or acrylic back, and an acrylic face. They are the most popular choice for retail storefronts and commercial buildings due to their professional appearance and excellent visibility.

Types of Channel Letters:

Front-lit (Standard): Light shines through the translucent face
Back-lit (Halo/Reverse): Light shines behind the letter creating a glow effect
Front and Back-lit (Combination): Both face and halo illumination
Open Face (Exposed Neon): No face panel, exposing the light source

D

Digital Sign

An electronic sign that can display changing content, including text, images, animations, and video. Digital signs use LED, LCD, or other display technologies and can be programmed to show different messages at different times. Also called electronic message centers (EMC), digital displays, or LED signs. They are popular for businesses that need to communicate changing information like prices, promotions, or time-sensitive messages.

Dimensional Letters

Letters or logos that have depth and stand out from the mounting surface, creating a three-dimensional effect. Dimensional letters can be illuminated or non-illuminated and are made from various materials including metal (aluminum, stainless steel, bronze), acrylic, PVC foam, HDU (high-density urethane), or wood. They add visual interest and a premium appearance to any signage application.

Directory Sign

A sign that lists multiple tenants, departments, or destinations within a building or complex. Directory signs help visitors locate specific businesses or offices and are commonly found in office buildings, medical centers, shopping malls, and multi-tenant properties. They can be static (changeable panels) or digital (electronic displays).

E

Electronic Message Center (EMC)

A sign with a programmable electronic display capable of showing changing text, graphics, or animations. EMCs use LED technology and can be monochrome (single color, typically red or amber) or full-color. They are regulated by local sign codes which may restrict size, brightness, animation, and message hold times. Common uses include time/temperature displays, promotional messaging, and community information.

Exterior Sign

Any sign designed to be installed and used outdoors. Exterior signs must be constructed with weather-resistant materials and finishes to withstand rain, sun, wind, and temperature extremes. Common exterior sign types include channel letters, monument signs, pylon signs, building-mounted signs, and freestanding signs.

F

Facade Sign

Signage attached directly to the face of a building, also known as a wall sign or building-mounted sign. Facade signs are one of the most common commercial sign types and include channel letters, dimensional letters, cabinet signs, and flat panel signs mounted to the building exterior.

Flat Cut Letters

Non-illuminated dimensional letters cut from flat sheet material, typically metal (aluminum, stainless steel, bronze) or acrylic. Flat cut letters have a consistent thickness (usually 1/4" to 1/2") and can be mounted flush to a surface or with standoffs to create a shadow effect. They offer a clean, professional appearance at a lower cost than channel letters.

Freestanding Sign

Any sign that is self-supporting and not attached to a building. Freestanding signs include monument signs, pylon signs, post-and-panel signs, and A-frame signs. They are typically used when building-mounted signage isn't visible or permitted, or to mark property entrances.

H

Halo Lit Letters

Also called reverse channel letters or back-lit letters, these are dimensional letters that project light behind them, creating a glowing halo effect against the mounting surface. The letter faces are typically opaque (often brushed aluminum or painted metal) with LED modules illuminating the back. Halo lighting creates an elegant, upscale appearance popular for corporate offices, hotels, and high-end retail.

HDU (High-Density Urethane)

A synthetic wood alternative material commonly used for carved signs and dimensional elements. HDU is lighter than wood, doesn't rot or crack, holds intricate detail well, and takes paint finishes beautifully. It's popular for monument sign panels, dimensional letters, and decorative sign elements.

I

Illuminated Sign

Any sign that is lit, either internally (backlit, edge-lit) or externally (spotlights, gooseneck lights). Illuminated signs provide visibility at night and during low-light conditions. Common illumination methods include LED modules, LED strip lighting, neon, and external fixtures.

Interior Sign

Signage designed for indoor use, including lobby signs, wayfinding signs, directory signs, ADA signs, and decorative wall graphics. Interior signs don't need weatherproofing but must meet fire codes and ADA requirements where applicable. Materials can range from acrylic and metal to fabric and vinyl.

L

LED Sign

A sign that uses light-emitting diodes (LEDs) for illumination or content display. LEDs have largely replaced neon and fluorescent lighting in signs due to their energy efficiency (using up to 80% less energy), long lifespan (50,000+ hours), low maintenance, and brightness. LED signs can be static (illuminated channel letters, cabinet signs) or dynamic (electronic message centers, digital displays).

Lobby Sign

Signage displayed in a building's lobby or reception area, typically featuring the company name, logo, or mission statement. Lobby signs make a first impression on visitors and reinforce brand identity. Common styles include dimensional letters, illuminated panels, digital displays, and custom artistic installations.

M

Monument Sign

A freestanding sign that sits directly on the ground or on a low base, typically used at building entrances, developments, or corporate campuses. Monument signs create a professional, established, and permanent appearance. They are often constructed with materials like stone, brick, stucco, aluminum, or synthetic materials designed to match building architecture. Monument signs typically range from 4 to 8 feet in height and may include illuminated elements.

N

Neon Sign

A sign illuminated by gas-discharge tubes (neon or other gases) that glow when electrified. Traditional neon creates a warm, distinctive glow and has been used since the 1920s. While largely replaced by LEDs for commercial signage, neon remains popular for decorative and artistic applications. "Faux neon" or "LED neon" replicates the look using flexible LED strips in silicone tubes.

Non-Illuminated Sign

A sign that does not contain any internal or attached lighting. Non-illuminated signs rely on ambient light or external light sources for visibility. Examples include flat cut letters, carved signs, vinyl graphics, and post-and-panel signs without lighting.

P

Pylon Sign

A tall freestanding sign supported by one or more poles or pylons, designed for high visibility from roadways and highways. Pylon signs typically range from 20 to 80+ feet in height and are commonly used by shopping centers, gas stations, hotels, and highway-visible businesses. They may feature multiple tenant panels, electronic message centers, and illumination. Due to their height and visibility, pylon signs are often heavily regulated by local sign codes.

Post and Panel Sign

A simple freestanding sign consisting of one or two posts supporting a sign panel. Post and panel signs are cost-effective solutions for property identification, directional signage, and real estate signs. They can be made from wood, metal, or synthetic materials and may include illumination.

Push-Through Letters

Dimensional letters that are pushed through precisely cut holes in a sign cabinet face, with the letter faces sitting flush or slightly proud of the sign surface. When illuminated from within, push-through letters create a clean, modern look where only the letter faces light up against an opaque background.

R

Raceway

A rectangular metal enclosure that houses the electrical components and wiring for channel letters. Raceways allow channel letters to be installed as a single unit rather than individually wired, simplifying installation and reducing wall penetrations. They can be visible (surface-mounted) or concealed (behind the sign face). Raceway-mounted letters are faster to install but create a less seamless appearance than direct-mounted letters.

Reverse Channel Letters

See Halo Lit Letters.

W

Wayfinding Signage

A coordinated system of signs designed to help people navigate through buildings, campuses, or outdoor environments. Effective wayfinding includes four types of signs: identification signs (marking destinations), directional signs (pointing toward destinations), informational signs (providing relevant information), and regulatory signs (indicating rules). Wayfinding is essential for hospitals, universities, corporate campuses, airports, and large retail environments where intuitive navigation improves visitor experience.

Wall Sign

Any sign attached parallel to and projecting from a building wall. Wall signs include channel letters, cabinet signs, dimensional letters, and flat panel signs. Most commercial buildings use wall signs as their primary identification signage. Also called facade signs or building-mounted signs.

Window Graphics

Vinyl graphics or films applied to window surfaces for advertising, branding, privacy, or decoration. Window graphics can be opaque, translucent, or perforated (allowing one-way visibility). They are a cost-effective way to maximize storefront advertising space and can be temporary or semi-permanent.

Sign Industry Glossary.