Lumenok H-Nock Single Orange. The Lumenok (lighted arrow nock) is fast becoming the most popular lighted nock on the market. The Lumenok is a lighted uni-nock and adds only 22 grains of weight to your arrow. Simply remove your nock and put in the Lumenok and you are ready to go. The Lumenok H-Nock fits .234" ID. Easton: ST Epic, ST Carbon Excel.