Review on Cyalume 9-86000PF Mini ChemLight: Ultra-Bright Military Grade Chemical Light Sticks (4 Hour Duration) - Unmatched Illumination by Jason Franco

They are tiny and emit very, very little light. I bought 50 and taped them to my team's paintball goggle straps during game nights so we could tell friend from foe. In the light of the full moon we still couldn't see each other's lights beyond 15 feet. We should have used a little more. Also "red" is more like purple.