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Yep. Love them. I do a 3x3 space.

To each his own. I'm not gonna fight that heat from them anymore.

I was running 600s before and would yield between 1.25 and 1.5 lbs per light. So they do not outright replace a 600, but watt for watt they destroy them.

The heat they put out is astronomical. It makes them almost not worth it because your cooling cost go through the roof. I run 12 315s and a 36k btu mini split. Pull 12 lbs per harvest with a 350 dollar power bill. My buddy runs 6 600 DE and a 36k btu mini split. Pulls 8 lbs per harvest with a...

A little over a lb per light. I found the 315s have more penetration, but slightly less density than standard HID. Instead of tops being incredibly dense and the bottoms not so much, the 315s produce a standard density from top to bottom. I had to change my style of growing to get the yields...

Those plants were fed Ionic Bloom from start to finish. One bottle. 6in rockwool on cocomats, 9 plants per 3x3 table. 12 day veg. Topped once.

Blue Dream day 15. SunSystem315

I wouldn't waste my time with t5s. Only ones I recommend are the 4 ft single for cloning. 315s will do a much better job with veg, with less heat and power than t5s. cool your room. Not your lights. 4000 btu per SE 1000 or 6000 btu per DE 1000. If you haven't bought the lights yet you should...

It worked great drain-to-waste. Not so well in a recirculating system. So I no longer use it. I do use their potassium silicate though.

No machine will ever give you hand trim quality.

A 630w CMH would blow away that 1000w easily. And cost less on power bill. If your buying new equipment now a days, standard HID lighting is outdated. It is not the best choice IMO. They make inner and outer dimension flood trays, so poeple can fit them in tents. Look into it. Your local...

Sounds like a good plan. The mini splits are sized correctly for standard bulbs. If using DE I would use more. 12k for veg. 36k for flower. Those are your bare minimum in my opinion. Use Quest dehumidifiers, most efficient on the market. I use the 105 duals, it's the most efficient model...

In the winter maybe the heat/humidity will rise and escape in the summer it will not. If your gonna vent to attic, just vent all the way out of attic.

Vapor pressure deficit. Look it up. I love when people talk about somethin they have no knowledge on.

When it's hot, a plant transpires moisture to cool itself down. When your humidity is high, the plant doesn't have to transpire as much water, letting it deal with the heat much better. Therefore you should lower your nutrient strength, because your plant will be using more water than nutes.

Raise humidity.

Ionic.

Does anyone know of a bulk source of this. The hydro store prices are entirely too high. Looking for a no name un-marketed brand.

Hawaii has a medical program. The canabis I got while I was there was grown there.

OP came here for help and now people are trying to change her system completely. Flush your plants with water for a few hours. Dump that out and make a fresh nutrient solution. Write down the ph ppm and temps. Come back in 24 hours and check them again. If your ppms drops and ph raises your...