High intensity lightsticks glow brighter than normal glow sticks but for less time quite simply the reaction is speeded resulting in a brighter glowr traditional large 6quot glowstick bodyr very bright glowr available in yellow with approx 30 mins bright glow timer or in orange with approx 5 mins super bright glow timer r suitable forr industrial usesbreakdownswarningsuper glowstick poibeing brighterr r 2 year shelf life guaranteed