Why not aim for 5!
I have been promising to up my light game for months. I believe I have located a shop within walking distance that carries lights. If they have what I need, next month (approx) I'll have my little upgrade.
Question, do plants mind if the lights are switched? Or better to wait until this crop finishes? I'm just going into flower now.
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Nah they won’t mind. Assuming your getting a light more powerful, I would hang above at least twice the recommended distance for a day or two.
Got to figure HID growers have to switch from metal halide to high pressure sodium when it’s time to flower.