Im currently using a 2x4 tent, about to harvest. My next adventure is expanding so i have a Vivosun 4x4 grow tent with the roof. Asking opinions on setup up! Running lights, ventilation, fans and humidifiers/dehumidifiers!? Please and thankyou everyone! 
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As far as fans an ventilation you can’t go wrong with AC Infinity they also have their new bar lights on sale but a lot of choices on lights. 9 Best LED Grow Lights 2023 | Home & Commercial Grows! - YouTube
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Good info Dave 
alot to choose from.
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I like the 4x4 tents my self. I use the back to grow in mine. I use about a 30"x48" area. I had the filter and fan mounted on the side. It was pretty much out of the way. For a de humidifier. It will need to be out side the tent. For a humidifier. One would fit in the tent if you needed it. Unless you have super low humidity. Odds are you will not need one. I run as low as 40% humidity some times with small plants. 3 week old and up. It doesn’t seem to bother them. I would buy a light to fit the actual area you will use to grow in. Having the fan and filter inside will limit you. So, if you have not bought a filter yet. You could get one that can be ran as a pusher or puller. And save room in the tent by having both the fan and filter out side the tent 
A HLG 260 light would easily cover the area I grow in. I use coco. So I don’t try to fill the tent because of getting to the run off. Plus. A full tent means a lot of humidity. @CoyoteCody just started making clips for the 6" fans you will probably want to run in there. I also use a small floor fan to push air in through a lower vent. The set up works great
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@Not2SureYet
Can you show a pic of the fan pushing air in the bottom? I think I may also need to help push some air in my tent
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@HotAndHumid For exhaust I use a 6" AC Infinity…running at about setting of 3 for constant air flow.
For temps and humidity I use a Inkbird temperature controller and a humidity controller.
On each…there’s two plugs.
Temp…one “work” plug for oil filled radiator heater. The other “work” plug I have plugged into an AC Infinity Raxial 6" inline fan the goes into one of my round bottom inlet ports on the tent.
Humidity… room with tents is a lung room with a 70 pint self draining dehumidifier… On the inkbird… I have one “work” plug with a cool mist humidifier inside the tent… The other “work” plug I have another 6" raxial inline fan connected to a different inlet bottom tent port…
This way the temp either heats or brings in cooler air… On the other humidity either it adds humidity or adds drier air to the tent.
This way I keep my tents environment perfect for the stage and have no issues setting my VPD perfectly.
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So will you be running both the 2x4 and the 4x4 or are you replacing the smaller with the bigger one?
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Before switching to autopots, I used this to empty out runoff from trays.
It’s sold as a fuel transfer pump but got it at Walmart and it was a game changer
Just an idea if ya wanted to make it easier to get to.
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I use a fan like this that sits on the floor to push the air in. I ran 2 of the clip mount 6" fans blowing from the roof down. 4 plants in there and no bud rot I normally don’t do more than 2 plants in mine so I can do the run off. I am in coco. I made these plant stands to simplify things for my self.
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I have the inkbird for humidity,6 in vivosun running into 8in charcoal filter which im going to use 2 6in clip fans. A quantum board set up for a 2x3 with a row of red spec. And a marshydro light for a 2x3 ill put them to together. I bought the tent with the roof for the room above so its not so crowded. Juat gonna have to play around and see what i can figure out
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Eventually i would like to get an hlg blackbird 
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