This 20mm wide Glow In The Dark Safety Tape is designed to help user\'s easily find things in the dark.After exposure to light, this tape will illuminate for 10 hours. The self-adhesive backing will stick to most surfaces in and around the home or the office such as, the light switch, alarm clock, stair treads, glasses case or telephone helping to illuminate their position. This Glow In The Dark Tape is 3 meters in length and 20mm wide, there is a 50mm width tape available in this section of the website.