Channel letters are a versatile signage option. You can choose small letters to accent additional signage, or large letters as your main sign. You can create channel letter signage for the interior of your building, or choose bold channel letters for your storefront. With custom signage, the possibilities are endless!nt signs are an effective way to present your brand, location, and other information. Leveraging various materials, colors, and architectural elements, Comet Signs can create a custom monument sign that increases your entity’s visibility.