There is no switch with auto flowers. I have never done them but i hear light is 20/4 the whole time. Grow em big. Dont ever top but you can pull it over sideways to lst. Race to the finish
Sorry i dont have the experience. If it was me i would stick with 5000 until it was at least 12-16" tall then maybe one of each color for a few weeks then switch to 2700 once it starts to flower