Light sticks are plastic tubes filled with
two chemicals separated by a thin
membrane. Bend the tube and the
membrane breaks, mixing the chemicals
which give off a useful amount of
light, without any heat, and lasting for up to 8 hours.
in the bottom of your flight case and with a
shelf life of several years, you should
never again need to worry about being
left in the dark.
Also great for parties, barbecues, bonfire night etc...