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Temps do need to be in the right range. This is only a humidity to temperature chart as it relates to pressure differences. Root development, plant growth slows and will come to a halt at lower temps. Under led, optimal temps are 75 to 85ish on the high side. HPS, 68 to 75. At these temps, you'll see the biggest growth, and best flowering conditions.
Germination I keep things at 82*.
Germination I keep things at 82*.