These light sticks will last 12 hours and are perfect to keep around the house in case of an emergency.
The length of the light sticks is 6" and they produce a green light. They have a built-in hook so that you can hang them on something while you work. The glow sticks have a 5 year shelf-life from the date that they were manufactured. The duration of the light will depend on the temperature of the environment around you but should be worth it anyways.