CYALUME INFRARED GLOW LIGHT STICKS BRITISH ARMY MINI 1.5'' FISHING SURVIVAL
They are Infrared I.R versions so will invisible to the human eye. Colour: Infrared / I.R(Invisible to human eye). 3 hours in normal conditions. Manufacturer Quoted Glow Duration: 3 Hours. They are not a toy and should not be given to children.