Nockturnal® Lighted Nocks is the leading designer and manufacturer of lighted nocks for arrows and crossbow bolts. Nockturnal’s unique, patented, string-activated, linear switch with piston-driven assembly ensures activation of the LED bulb every time. Nockturnal® Lighted Nocks feature super-bright LEDs and long-life lithium batteries for superior illumination that lasts. Available in a wide variety of sizes and configurations that fit nearly any size arrow or shaft, these specialty nocks perform with exceptional accuracy when shot from both vertical and crossbows. Nockturnal® Lighted Nocks blaze down range with extreme brilliance with a wide spectrum of color options and offered as either constant single-color light emission or with dual-color strobing options on select models.