I am a little confused, and hope someone can help.
I am trying to wire three lights on a single switch, with POWER INTO THE SWITCH FIRST. I thought I needed to use 3-wire plus ground, between the lights (to allow for smart switches to be added in the future).
In an diagram I've seen, for 3 lights and 1 switch (WITH POWER INTO FIRST LIGHT), the wires between the light fixtures are 3-plus Ground.
But in the image below, with the power into the switch first (which is what I want), ALL the wires are 2-plus Ground.
Is it OK to use 2-plus Ground wire throughout my project (Power into switch first)?