Lumenok GT Fits: .246 shafts Gold Tip Ñ Pro Hunter, XT Hunter, Expedition Hunter, Big Game 100+, Ted Nugent Signature, Velocity. Vapor Ñ Predator, Predator Pro, Hunter, Hunter Pro, Pro Black, Pro Whitetail, Whitetail, Carbonwood, Wayne Carlton Signature, Vapor Jets. Activated by the force of arrow release. Archer is able to follow arrow path. Makes finding arrows much easier. Saves time and cost. Visible for great distances in the dark. Has the ability to remain lit for 40 hours. Visit www.lumenok.net for more information.