Frontlit led channel letter 1) Indoor or outdoor 2) Lifespan over 50000 hours . 3)warterproof. 4)CE&ROHS Front led light letter 1. Material: front acrylic/epoxy resin cover,#304 stainless steel around and back pvc or s/s with screw for install2. Letters: different colors and sizes and styles are according to customers' requirements. 3. Various lamp and acrylic and resin colors: White, blue, red, ...