I use Lumenocks, my wife uses Nockturnals. It may just be the color, but my Orange Lumenocks are considerably brighter than her pink Nockturnals.

What I like about Nockturnals: how they activate and deactivate. I love the 'switch' internal to the nockturnals. Stick it in the tail, clock it how you want, and never worry about having to reclock. Very positive on and off, switch turns on when you shoot, clicks off easily and positively.

What I don't like about Nockturnals: Deactivating them requires a tool, or fine pointed knife.

What I like about Lumenocks: They're bright.

What I HATE about Lumenocks: How they activate and deactivate. To deactivate, you have to pull the nock slightly out of your shaft. If your shafts are too tight, it's hard to do, so you might break the tips off the nock if you use the wrong tool. I end up biting the nocks and twisting them with my teeth, which mars up the nocks pretty bad after a lot of shooting. If the shafts are too loose, then they turn on and off way too easily. You have to be mindful that you re-clock your lumenocks EVERY TIME you shoot them, because you'll inevitably twist them as you turn them off. If you pull them out too far in a tight fitting shaft, you'll end up NOT turning on when you fire. Loose fitting nocks can bounce out of the shaft on impact with a target also.

When I cycle to get new lighted nocks, I'll go Nocturnals over Lumenocks, even though they aren't as bright. The Nocturnals are plenty bright enough.