Always know where your arrow goes with the Lumenok. The Lumenok GTG green is the best tool to allow archers to follow the path of their arrow. This model Lumenok contains no moving parts, only a battery, a wire and a light source arranged in an open circuit. The material in the arrow shaft completes the circuit. This Lumenok is made using a GT Nock from Gold Tip, and does not require any magnets.