If you want to customize a channel letter sign further, consider adding a backer panel. A backer panel is an optional sign feature typically made from aluminum or ACM. You can use it to optimize channel letters’ appearance by adding contrast and helping them stand out more. It can be instrumental in amplifying the halo effect that reverse-lit channel letters create, though they are useful with front-lit channel letters. Keep in mind that if you use a backer panel with halo-lit channel letters, it’s essential not to use a glossy finish. You might think that it would amplify the lighting best, but having a mirror finish will backfire since you’ll be able to see the reflection of the actual lighting within the lettering.
