I shoot a size G. For the injextion 4mm shafts. Got some nockouts from buck hollow. Way better than nockturnal. In size G- I had a lot of problems with nockturnals. More than 50% didn’t work. Maybe worse. Like.... brand new, shoot & no light on over 50%. They were junk as far as I’m concerned. Switched to nockouts like I said - shot a few & so far so good. Buddy is looking at some for size G. Only ones he mentioned that may be better is “firenock”. Ratings are good. I’m set for now with mine BUT.... has anyone shot firenocks? Reviews are really good BUT the price is steep!!!!! If they are the awesome- maybe worth it. I won’t use the junk in past that was worthless though. In a size g- never a nockturnal ever again. But- any others or thoughts on solid lighted knocks in general? I shot a pile of does and some bucks and I know when a brand has performed like crap & sure be nice to figure out who has best lighted knocks in recent years. Any input appreciated!