**サイリュウム** – _sairyumu._ Named after Cyalume, an actual brand. Often confused with LED light sticks and has become synonymous with them, but they actually refer to **chemical light sticks**, **chemlights,** or **glow sticks**. These are intense sources of light that with the most common varieties only lasting around 1 and a half minutes (depending on the type as some are more intense and last only a handful of seconds before it quickly starts to fade) and they are usually activated during key parts of a song.
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**サイリュウム** – *sairyumu*. Named after Cyalume, an actual brand. Often confused with LED light sticks and has become synonymous with them, but they actually refer to **chemical light sticks**, **chemlights,** or **glow sticks**. These are intense sources of light that with the most common varieties only lasting around 1 and a half minutes (depending on the type as some are more intense and last only a handful of seconds before it quickly starts to fade) and they are usually activated during key parts of a song.
There’s a lot to add to this that goes beyond the scope of this glossary but suffice to say, people either love it or hate it but they definitely see it.
