chemical light; glow stick; light stick
Refers to a single-use plastic tube that produces light through a chemical reaction, often used at concerts, festivals, or for emergency lighting. The cross-reference サイリウム is a common synonym.
See also: サイリウム
I waved a glow stick at the concert.
The chemical light came in handy during the blackout.
Variant with interpunct; less common in everyday writing.
Loanword from English 'chemical light'.