My tent is in a room lacking insulation thus is a victim to cold temps overnight when my lights are off. Its a 4x4 tent with daytime temps with lights on around 73-75 but dipping as low as 63 overnight. Is there anything safe and not a huge drain on my power bill to bring those temps up some?
Good evening. I put the tent on top of 1â insulation board and draped it with a sleeping bag to keep temps in the 70âs.
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Those overnight temps arenât bad at all. Save yourself some money. 
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Replied at the same time as @JaneQP , and I didnât mean her idea was a bad one at all. I just meant that personally I wouldnât worry about nighttime temps in the 60âs. If you can, try and get your daytime temps into the low 80âs if youâre using LEDs
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@MattyBear no worries. My basement tent in winter would be constantly in the 60âs without insulation!
Outdoors in my location we typically have 20 degree changes between day and night and nothing I can do about it,
Best to both of you!
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I would love to get day time temps higher only way of doing that is via a heater in grow tent im guessing.?
Good idea.
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Doing what @JaneQP suggested might bump you up a few degrees during the day too.
@JaneQP i wish I could get a bigger temp swing in my tent at lights out TBH. I like seeing the color expressions that the colder temps help bring out in some strains.
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@MattyBear I had so much purple showing with those temps swings outdoors last year it was absolutely beautiful.
My ILGM strawberry cough turned red and the super lemon haze yellow.
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I have an oil filed heater that is is lung room connected to intakes. Keeps temps up in the 2 bigger tents at dark time.
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I changed my lights to go on at night to combat the cold. Lights on 10pm, lights off 10am Mid 70s during lights on high 50s low 60s at lights off. Plants donât seem to care. At least they havenât said anything to me about it 
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My tents drop to 55 (PNW winter, un-heated drafty garage).
I am working on resolving or raising the OHH hours temps.
I use the under insulation, and with @JaneQP got an idea for above.
Forum and AC-I sales supported possibly using seedling materialto assist reducing off-LED swing temps.
Splitting my hours between the two tents may reduce swing and , may actually turn benificial.
Updates will be available on thread RE-Veging a continous grow garden.
Good growing to you.
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Thats definitely a option for when i switch to 12/12 cycle running 18/6 week 2 of veg now
Iâm lights on 9pm-9am, but even throughout the day now, I have needed oil radiator heat to supplement . Granted, my 5x5 âroomâ is 6" 30r insulation -top, bottom, sidesâŚso the heater cycles maybe 3 times an hour to keep 68fâŚ
Itâs when we get to January, and snow turns to ice , temps go to single digits⌠Thatâs when my insulation pays off.
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Man youâre golden. I would love temps like that. VPD is about in optimal range too. I wouldnât change anything unless youâre in flower. If so, Iâd be more worried about the humidity
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Definitely running dehumidifier in flower. Thanks
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My temps stay mid 70âs during lights on, and low 70âs lights off. I have an hlg 350r. Most purple Iâve ever had on buds, and ironically the first time Iâve grown with this light in the winter, in a tent.
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The heater is in between 2 tents with flex duct sticking out tent. 2 poles on top of tent. A large cardboard box to act as wall and ceiling to hold heat in. Primitive, but it stays warm in those 2 tents. This is pic without box âwallâ.
I have the 2 tents also connected to the exhaust fans that go into basement with a booster fan.
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