Im currently just playing with bagseed trying to get a better understanding of things before i use my good seeds I am organic, a very basic mix from InTheGardens thread thats peat, ewc, and perlite woth espoma tomato tone, kelp meal, and garden lime. I just transplanted into SIPs yesterday for two of them so they look so overwatered it sucks :-(. Heres my issue: Lighthouse 2.6x2.6x5 tent, running an advanced LED DS100 so there is literally NO heat from it. My house is set to 70 but the room this tent is inside is on a no-sun part of the house so its always cooler. I dont think my temps are helping my little ones :-(. Day i see TOPS is at 74ish now, and this is with a pc fan 120mm to exhaust this tent temporarily.... my 4" inline comes tomorrow and im afraid itll freeze in there dialed down cfm. With this small pc fan the tent inside feels colder than my hygrometer says. I saw 58 temps at night. I am thinking of a small, 150/250 mh/hps light for this winter cold, and using led as supplemental or summer grow light. Can i run a 250w air cooled even 6" with my 4" fan and be ok? The AC tube will exhaust in the same room so itll warm it up a little too...i was looking at the setups on ebay from gotham hydro like the 250/100w mh/hps so i can use it at all times without creating heat like my buddy's 400. Any ideas? Thought about an oil heater but it takes 600/1500 watts! So a heated light inside may be better...and the 6 hrs dark would prob stay warmer with that in mind too.. since itll be partially recirulating that warmer air in the room/house. Thanks!!