Lumenok Lighted Arrow Nock
The Lumenok is a lighted uni-nock and adds only 22 grains of weight to your arrow. The Lumenok will work with any aluminum arrow that uses the Super Uni bushing and almost all popular brands of carbon arrows such as Carbon Express, Carbon Vision, Epsilon, Easton Evolution, Beman ICS, Beman Matrix, Gold Tip, etc. The Lumenok comes on when shot from your bow and stays on until you turn it off. 3-volt lithium battery has a 5-year shelf life and will stay lit continuously for 40 hours.