cold temps ??

[chevey]

I have 64 when lights are out,73 when lights are on?my The tent in question is 4'×8'×6' high.l have 1 600 going,fan,cold air coming in 6 inch fan,8 for extraction. My last indoor l had potassium problems, cal@mag ended up putting 2 heaters in tent brought temps up to about 84 lights on about 76 off.So after about a week leafs were getting 2 dry shut off the 1 heater that would have been there 6th week of flowing 7th ran with the one heater.8th week down they came.Ended up with 15 zips wet they ended up drying just under a quarter! With 5 plants.
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[The Hemp Goddess]

IMO, 64 is not too cold for lights out.

 

[yooper420]

Agreed, 64 is not too cold. Many nights my garden room gets down that low. Will not hurt a thing IMO. Might even add a little color. With lights on, a high temp of 73 seems a little low. What`s your humidity at ?