These long-lasting 6-inch, 12-hour Glowsticks provide immediate and dependable light. The glowsticks are non-toxic, non-flammable and safe to use in situations when flammability is an issue, such as to check gas leaks or to mark the road when a fuel spill occurs. They also make a great instant light source to help you find a more permanent source of light during an emergency. Stock up for your 72-hour kits, auto kits, and for special occasions, such as parties and holidays. Also great for Boy Scouts & 4th of July!