Yellow 30 Minute High Intensity Lightstick Unique high tech yet low cost option for a durable source of cool super bright, fluorescent emergency tactical lighting without batteries, fuel, flame or heat. A must for every life vest and survival kit. Simple, clean activation in seconds...just bend, snap and shake for 1/2 hour of high intensity yellow lighting. Sold Individually or in 10 Pack. Weighs .04 lbs.