It adds only a few grains to the weight of the archer's nock, depending upon model selected. Select from the following model nocks: Carbon Express TCX nock, the Gold tip GT nock, the Super Uni-nock and the Easton X-nock for small diameter carbon. See table below for weights. Little effect to arrow flight is detectable.
The Lumenok requires no magnets, no glue; it contains no switch or any other moving parts. There is nothing to attach to your bow, or glue into your arrow to make it work.
Fits most popular arrows
That includes any arrow that accepts a Carbon Express TCX Nock, Bohning Signature Nock, Easton Super Uni-nock, Gold Tip GT nock, or PSE nock. The The Lumenok-X is available for Easton Axis, Superslims and Beamen Black Max arrows