Exitronix GCLED-U-BL is a Thermoplastic Exit Sign Emergency Light Bar Combo 120-277V with Battery Backup and Remote Capable Double face Green Letters in Black Color Finish. The Revolution Series offers maintenance-free, long-life, dependable service and easily mounts above doors and in restricted spaces to fit any application. Unique "Light Bar" design combines LED exit illumination with reliable, low-profile LED emergency lighting.