Happy Camper Light Stick
The Happy Camper Light Stick was actually made for survival and military use by a team of veterans and active Armed Forces members, but we clubbers know a good light when we see one. These look just like a 6" glowstick when lit. The manufacturer describes these as "ideal for survival, hunting, camping, child safety, and military" applications. We think these are a great replacement for regular throw-away chemical light sticks. Each stick has a convenient twist-on/off switch and a handy integrated clip. Uses 3 long-lasting, replaceable AG-13 batteries (included).
These light sticks have been tested in actual military applications to work on one set of batteries for over 100 days at 30 minutes of use per day. These sturdy sticks have been used in rain, jostled around in camping gear, and undergone rigorous military training use. (We still don't recommend throwing or smashing them, as they can break!)
Picture of Happy Campers in use at a concert: