|There is more information available on this subject at Chemical light stick on the English Wikipedia.|
Chemical light sticks are plastic tubes containing two isolated elements that when combined, are capable of producing light through chemoluminescence. They are currently used by the UNSC. When lit, they glow a bright fluorescent color, and are used primarily to mark areas or as emergency lighting.
- In Halo: Combat Evolved, Marines use wands that glow blue instead of yellow, and are used for tasks like ground guiding vehicles and aircraft.