The TP 254 Illuminated Nock from Lumenok was designed to interface directly with TenPoint crossbow bolts that use a .254-inch internal-diameter aluminum bushing, ensuring consistent mechanical fit and electrical activation. Lighted nocks function by completing a circuit at launch, allowing the shooter to observe bolt flight, confirm point of impact and recover the projectile after the shot.
Across Lumenok models, activation occurs when the shot completes a circuit — no switches or magnets required — and illumination can last for roughly 40 hours using replaceable batteries, allowing extended post-shot visibility and reuse. Proper conductivity at the shaft end is essential for reliable activation; residue, coatings or insulating materials can interrupt the circuit and must be removed during arrow preparation. MSRP: $34.99/Three-pack. lumenok.com
