Mighty Glow glow-in-the-dark tape comes in 2 and 4-in. wide widths with a luminescent 1/2-in. center-line. The luminescent material is “charged” by normal lighting. If the material receives adequate lighting before a power failure, it will glow in the dark when the lights are out. Single-toned luminescent floor tapes make inferior aisle way borders because the greenish-white luminescent color contrasts poorly with most surrounding floor colors. The Mighty Glow safety yellow color makes a discernable contrasting border with most surrounding floor colors and the bright glow-in-the-dark center stripe will expose aisle ways during lights-out power failures.