PipeCarver
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Like said above air movement above below and in the middle I've 4 running 24/7 in a 5x5......they are also better at containing the heat. Its sometimes hard to get up to a steady 78f in the open space of my basement but a small heater can keep 150sq/ft or so warm easily. Its also neater by being contained we're forced to get everything in that smaller space . I've not tried HID in them but for LED they work very well.Is pm a bigger problem with these tents? I see a lot of people using tents and other than the kind of neat square packaging and all around reflection, keeping the dark in.... I would think it creates more heat, less air flow......I'd rather use a closet or reseved open space. This aside, Nesta your plants look very healthy. Good job.