Coghlan s Assorted Lightsticks 4-Pack offers safe reliable light in all conditions. This chemi-luminescent technology is available in several colors which allows Lightsticks to be used as warning lights marker lights signal lights dive lights or safety lights as well as dozens of other applications when camping fishing hunting or hiking. Green Yellow and Red Lightsticks provide 12 hours of light while Blue provides 8 hours. 4-Pack of Lightsticks Green Yellow Red last 12 hours; Blue lasts 8 hours Non-toxic Weatherproof Cool to the touch Lanyards included.