also: さいりゅーむ · さいりゅうむ
glow stick; light stick; chemical light
A plastic tube that emits light when bent, commonly used at concerts, festivals, and for emergency lighting. The term is a genericized trademark from Cyalume.
See also: ケミカルライト
I waved a glow stick to cheer at the concert.
During the blackout, the chemical light came in handy.