I have some cmh and they are so so. extremely heavy with ballasts in the hood. I used to run 400 in a cabinet and that was less than 5 feet high, you could do 20 oz or so under 2 400. I am running quantums now and they do put out a lot more heat than air cooled hps.
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Thats who we went with for the GH build.
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My average is 54-57oz from 4x 315 w/co2.
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yield is usually more to the genetics than the light. How far away are you keeping the light.
1.5’ +/- 2"
I use large hoods. This allows a wider foot print, but I need to keep canopy distance close.
Yes, genetics play a role. If I run a 16x darlins net, I can be 4.25# per 4x315. I now run 8 DN of 14 main spots. Now that I have the 5x cob working decent, that alone is good for 6oz.
When I ran 3x600hps I got about the same yield.
There’s a lot of aspects that go into yield- veg time, square footage, genetics, watts and spectrum. If you get a baseline with similar square footage and veg time, modern 3-4k +660nm LED’s are getting north of 1 gram per watt, up to 2 grams per watt.
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thats what im not so hot on the cmh. I have sun 630 and air cooled, its too heavy and I like the quantums or hps over it.
thats what im running, china quantum with samsung and cree 660. I have a hlg 600 and thats good but china is the same for less.
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I will never buy a hood/ballast all in 1. Keep the heat out! 630cmh needs a 4’ canopy at min.
If you chose a dual socket raptor hood, toss in 1x 3k cmh and a 4k cmh in the same hood, it would greatly change your mind. That is much better than a 630 all in 1 unit.
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I switched to led for now. Ill probably sell the cmh soon.- thats another thing I dont like- they ship horribly. both of my suns were damaged and most reviews said they came damaged. Its too much weight in the hood with the ballasts inside.
my 630 is a dual socket with one 3k and one 4k ? I didnt know there is a630 bulb, mine is 2 315’s in a ac or non ac hood, i have both. I think I heard with cmh you want the bulbs hot, so the ac hood pulls air across the inside but not the bulb. I think your co2 may be allowing the light to perform better. I like ac hps, I can have it super close or not, and now i like quantum boards .
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Without question.
If you ever have a chance to run a sealed garden, do it.
you need a dehumidifier right? My sump pump is going off for two days from a rain, my house runs moist, i use hoses in tents so im not sure how to seal that up for co2. wouldnt it be unsafe to make the whole basement co2 rich? I used to have a co2 guage and in my apt the air was full of co2, the guage broke and i have no idea now.
one of my issues with led at the beginning is I just didnt believe it was stronger, it would perk up with co2 also.
You should be running a dehumidifier in your garden regardless. The night time swing alone in RH is way to much without one.
I still don’t believe it’s stronger. Waiting to test it myself before I make my final judgement though
How are hoses a problem in your sealed garden?
So yeah, US support is definitely the downside. The way I look at it is that learning to program Siemens has more value than learning AB because you’re in a smaller set of competent engineers.
Overseas this is not the case at all though. We still buy tons of “used” (new old stock) hardware from Poland and such.
I’ve only had one bad experience with Siemens automation hardware failing and it was a beta product for us. My experience with AB hardware has not been as good but then again the AB stuff I did work with was much older.
Another note is we use a good bit of stuff from Turck, Balluff, Festo etc and using them in TIA is basically the same as using Siemens hardware which is great. Even integration with the SMC line is super easy. Compared to other protocols, I stay away from anything other than PN now.
But yes. If someone else has to fix it, good luck finding a knowledgeable Siemens tech. AB techs are a dime a dozen
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it would no longer be sealed and these quantum boards put out lots of heat and plants make humidity. How do you run co2 in a tent without a mini split?
I just use constant ventilation.