So i use this as single use on my .204 hyper flight arrows. They crush when you shoot them but man it stayed lit up bright green from thursday at 1pm to Wednesday morning at about 11 am.

Great nocks - must have slightly changed the design though, a touch wider than an actual
X nock is now

Nockturnal are the best lighted nocks I have used. My whole family uses them

Love them! It's the only lighted nock I'll use on my arrows. They've fit on every brand of arrow I have and they last forever.

Best on the market !! Long lasting

I purchased the green x nocks and they are better than I thought they would be. I’ve used other brands but wanted to try nockturnal nocks because these don’t use the wire that wraps around the shaft of the nock. They work flawlessly. Turning off the light after a shot is easily done with the tool or a very small flathead. I would recommend them to anyone that wants to shoot a lighted nock.