Quick tip for extra harvests per year if you have the right set up and don’t run perpetual.
First you need a dedicated veg room and a separate dedicated flower room. You will also need a way to get small plants; seeds, store bought cuttings or a dedicated mother room.
If you have this, then simply turn your veg room to 12 hours on/off two weeks (or so) before you harvest your flower room (plants do not need the powerful light yet and your plants do not look like they are flowering to keep you under your “plants in flower count”). Your plants will be two weeks ahead of schedule in the flower room and the next batch will be two weeks ahead of schedule and so on. On an eight week strain you get two extra harvests per year.
This is not for everyone but if it fits your grow style it really pays off.