All my crossbow and vertical bow arrows have Deepower lighted nocks. Simple switch on and off. I used the Ten Point Alpha ones, but I hate that they are difficult to turn off and extremely difficult to transfer to another arrow without damaging the contacts points. Plus, $45 for 3 nocks? The new Deepower nocks for this year are very similar in shape to Alpha nocks, so they are what I am using. Plus, $18 for 6 makes it a no-brainer.
For as much as we pay for arrows, it only makes sense to be able to recover them after the shot. Lighted nock are the easiest way to accomplish that.
I have never noticed any accuracy difference between lighted and basic nocks once the weight and balance change is accounted for.