Fulham's FLPL50SGB photoluminescent exit sign is self-luminous and uses no electricity. It has a green background and field applied directional chevrons. With a 20 year estimated life and virtually no maintenance (no bulbs or battery to replace), you can feel confident that this glow-in-the-dark exit sign will provide high visibility in total darkness and smoke filled conditions for years to come. This exit sign can be surface mounted, flag mounted, or ceiling mounted, and includes a black frame and mounting bracket. It has a legible viewing distance of 100 feet.