Channel Letters Signs are completely custom signs made of individual dimensional letters and logos. There are 3 types of Channel Letter Signs; front-lit, halo-lit, and front and back-lit. They are almost always illuminated and can be made to match any company's branding. The sign of choice for Business Owners and Property Owners. making them the most popular type of exterior Business ID signage available on the market. They are made in a variety of styles; front or face-lit letters, back or halo-lit letters and front and back-lit letters.