To turn off, simply slightly wiggle the nock back and forth in the shaft, which breaks the electrical contact. Lumenok only adds a few grains to the weight of your arrow and uses the bare essentials - nock, light, battery and conductors to operate.
Lumenok is perfect for hunting and target shooting and aids bow tuning and because it is a lighted nock, you clearly see erratic arrow flight immediately and can correct your shot. See your arrow from the moment of release to the point of impact, when practising at longer distances (more than 91 metres or 100 yards).