Red or Pink to me. Here is a good video I saw on Youtube. Nockturnal Lighted Nocks Pink vs Red - YouTube
Pink hands down. The pink plastic really enhances the red light Sent from my SGH-T999L using Tapatalk 2
i use pink, and they work really well for me, they are very bright. i posted this question on the cabalas website where i got the nocks from, and they told me pink would be the brightest
I recently got my first set of lighted nocks. It was a 3 pack from Walmart for $24.95. They are red nockturnals and seem pretty bright and work great for me but that's prob just because I haven't used others before. Haha