Don't be dissatisfied with materials that stop glowing between dusk and dawn‎.‎This tape‎,‎ after exposure to a good light‎,‎ will keep glowing for more than 24hrs andbe clearly visible to the dark adapted eye‎.‎ for the US this tape meets their Military Specs‎.‎Specifications‎:‎Safety‎:‎ Inert and non‎-toxiclife of afterglow‎:‎ 4 hoursLifespan of luminescent material‎:‎ 5 years+Adhesive‎:‎ Non‎-permanent/peelable typeColor‎:‎ Light GreenEmission Colour‎:‎ GreenWidth：25mmLength‎:‎10MCountless uses including‎:‎Crafts ‎- Light Switches ‎- Hotel Rooms ‎- Bicycles ‎- Schools ‎- CampingKey Holes ‎- Boating ‎- Nightclubs ‎- Offices ‎- Warehouses ‎- Garages Theatre‎- Fishing ‎- Name tags ‎- Alarm clocks ‎- Laboratories ‎- Hobbies ‎- Theatre