One of the more popular methods of signing in retail complexes, channel signs usually consist of individual internally-lit letters constructed of aluminum with acrylic faces. Historically lit with neon tubes, most channel letters these days use LED modules as a light source for reduced energy costs and ease of installation. Channel letters can be constructed as Front-Lit, Back-Lit, Front- and Back-Lit, or Open Face letters. See the descriptions below for an explanation of the various lighting methods.
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Front-lit Channel Letters
In this type of letter, the back and sides of the letter are made of aluminum and the front face is translucent white or colored acrylic. The acrylic can also be overlaid with translucent vinyl for added design possibilities. When illuminated, only the face of the letter will light up.
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Back-lit Channel Letters
These letters are constructed with a solid face and a clear acrylic back. The letter is then installed so it stands out from the wall, and when it is illuminated the light reacts on the wall and lights the letters in silhouette. The faces of the letters can be given an anodized or painted nish or overlaid with vinyl for daytime color.
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Front & Back-lit Channel Letters
By giving the letters a translucent face and clear back, they can be made to be lit in the front and also halo lit from behind. Bank of America signage is a good example.
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Non-illuminated Channel Letters
Channel letters do not have to be lit. This business is in an industrial business park and does not need to have the sign visible at night.
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Halo-lit channel Letters
"Halo-lit" is another term for back-lit. The sides and faces are solid with lighting behind the letters.
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Halo-lit Channel Letters & Cast Metal Letters
Varying the type of letters used on a sign make it more interesting.
