Keeping track of your arrow is easier than ever when using Lumenok H3 Lighted Arrow Nocks. This 3 pack of lighted nocks that allows you to track your arrow all the way to your target, as well as allow for easy retrieval (especially in low light conditions). Additionally, the Lumenok H3 nock is able to glow for up to 40 hours at a time and lights up instantaneously when shot due to the shots inertia.