On my hps I've got a magnetic ballast so no dimming I run my ac in about 65 from beg to mid flower then I run it one 60 towards the end Temps are always under 78. Towards the end I like to have Temps around 73!
I run a 4'x 12' flowering foot print on 1500 watts of cobs for better yield than my 3k watt hps and I don't even vent the room or have any fans. My temps with lights on 24/7 are 84 degrees max 77 at night. Temp outside 93 degrees or less. This room gets good ac and normal room would need a 4 or 6 inch out or a box fan in the door way.
How many professional grows do you see using led? If u go to YouTube and search any major professional grows they all use either hps or the lec, which are both considered high intensity discharge (hid) lights! Now there are some leds that will beat but not blow away hps, but they cost an arm and a leg! It's just stupid! But hey to each their own! There are many ways to skin a cat! Just don't go spouting crap that isn't true like the price to run hps bc that's all b.s. I've ran hps for 4 years now!
My most expensive bill bc it's summer and was running all a/c 24/7 I have 4 of them!
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Why lack of warehouse grows using them?
1. Upfront costs and ignorant investors. It looks better on paper to show your investor cost of starting with HID vs. LED. They are the ones footing the big bill and when using other peoples money you do what it takes to get your foot in the door most of the time. Upfront costs are really the big thing here though, but this is quickly becoming a thing of the past.
2. Full spectrum cobs are really just hitting the market big time and making in sense in the past 2 years. This year especially.
3. What part of cost to run hps is wrong? Pretty vague statement of yours.
I have been growing 'professionally' for 4 years now. When I say professionally I mean a professional facility like you see on 'youtube'. Grow houses for a little more than a decade (I still run one as a back up for moms and everything else). I started off with 4k HPS grow houses and after 2 years bumped it up to 8-10k and split the risk between 3 homes so if one went down 2 others were still poppin. I know the costs to run HPS and I know what I saved switching over this last year to full spectrum cobs at 1200 per light. I don't work for any company that sells any equipment. I have no reason to lie or to lead other people astray. I work for my self and run a rather large grow facility. When I was deciding to switch to LED I built a grow house again on small scale so I could see if it was really worth it. Well it was and it was amazing for me to think and understand how beneficial this is to your average home grower, especially someone renting (not needing to run 30 amp lines to flower rooms is HUGE). The past 3 years has been huge for LED.
It did not make sense to switch over before this because of spectrum, equipment failure (research flip chip technology for reasoning), and cost. It now only makes no sense to switch because of upfront cost. The future is here and in a big way. The next few years will be huge improvements to chips for LEDS and continued lower costs of production. There is no real tech that will beat out LED at the end of the day when it comes to HID. LEC's are an awesome improvement, but I see no room for improvement after these that could compare to the tech that LED has and will have in the future.
This will end my LED discussion because saying anything else is beating a dead horse at this point.
Grows like an OG and is pretty easy to grow. I could have been more consistent with the feedings and I would have done better.