they are doubles, and the competitions are for strickly nunchaku no poi or ne other freestyles. heres a vid from one of my favorite chuckers.
i know its not glow but i think nunchaku and poi are very similar and have the same basic foundation which is have fun and be creative.
i know alot of people here dont like to make glowsticking or poi a competitive sport but i think its nice to have freindly matches and work your way up the ladder and maybe oneday overthrow the person that taught you what you know, like student beating sensie.
and yeah that song is phenominal.