12 Hour Light Sticks with a 5 year shelf life is the most inexpensive way to have an emergency dependable light source. Light sticks are inexpensive and produce enough of a light source to light a small area. They are easy to operate; simply “snap” the light stick and it will give you up to 12 hrs. of illumination. The small size permits the user to drop them on the ground, hang around the neck or hang in an emergency shelter. The shelf life of light sticks is now 5 years. Life expectancy is limited by extreme heat and cold because they are chemical based. This is a must for any emergency kit, glove box, or backpack. Keep some in a first aid kit also.