The G300F-OB Obstruction Tape is easy to install and remains visible for hours in complete darkness. Ecoglo G300F-OB is used to identify obstructions within an egress pathway. The G300F-OB is designed to last with a premium integrated adhesive which provides a superior bond to a variety of surfaces. The non-radioactive, non-toxic photoluminescent tape is visible for many hours after the lights go out, having been charged from sunlight or artificial light.