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Most LEDs have active cooling so a fan that makes noise. Some Leds are passive cooled so they have a special heatsink to help cool them. They produce heat just not as much as other light type like HPS. Top of the line LED is in the 60% efficient range. SO 60% light and 40% heat but the light...

I would not touch conventional soybeans, but organic soy would insure that it is not transgenic or GMO. Good source of nitrogen ,soy meal npk is usually 7-1-2.

If this was true I would say no But i think they can be matched by going with a lot of smaller cobs run low can match 3.0 umol/j. This stupid calculator makes me want to buy some v22's and light sensor to see what it will do. my guess is they will be closer to 3.0 than 3.4 umol/j. But if they...

According to this paper it looks like soybeans, wheat, and cabbage have the highest chitinase in the plants they tested, lol top dress cabbage I guess. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0113596

Not sure you will get the same heat load with a 6 cob fixture running vero 29's C's in a 3x3. It would put out over 1000 ppfd @ 1050 ma. But you are going from 1 cob a sq ft with a 2x2=4 sq ft with 4 cobs to a 3x3 that is 9 sq ft with 6 cobs. so that drops it to .667 cobs per sq ft. So it for...

Yeah it is actually pretty slack of them to sell them with rubber grommets if they made them out of silicone these things can last 4 to 5 times longer but they want to sell you a new one every 2 or 3 years. You can even hot glue them back in place but making a grommet out of silicone lets it...

Yeah it is, that's what they do when they wear out, get really loud. They sell the replacement rubber pieces on ebay but I made my last set out of silicone so i shouldn't have anymore problems for a long time.

Yeah that will work for a 5 gallon bucket You can get a 6 watt 4 port one if you want a extra boost or if noise bugs you. They have a pot you can adjust the output so lower with more stones would be quieter. Smaller stones are fine for this pump and a 5 gallon bucket. They dont have the ones I...

Had one of these for 7 years had to pull it apart and replace the rubber swing points a couple times but other than that it works great...

But is the bridgelux calculator true ? Bet I could sell a light or two that could really do 3.4 umol/j

You can get a watt meter to figure out how much you have dimmed 160 watts is 33 % of 480 Otherwise it is tough to tell how much you have acutally dimmed. https://www.amazon.com/Electricity-Monitor-Voltage-Overload-Protection/dp/B07DPJ3RGB/ref=sr_1_5?keywords=watt+meter&qid=1578194267&sr=8-5

You for sure don"t want to hit new clones with 480 watts if you are going low to the canopy really you can dim it to 33 -50% for vegg and 75- 100% for flower. I think most run those between 12 to 24 inches from the canopy. Running closer to the canopy is more efficient but people do hang their...

10% far red was frying some leaf at least at the height I run my light it was. So I slapped a newer XLG-25-AB on the light replacing the non dimmable lpc series driver. For sure going to have to add a PWM module for dimming the far red channel after this run like the other two drivers add a...

You might want to check out VPD vapor pressure deficit. Basically tells you what humidity is best by factoring in the difference between room temperature and leaf temperature of the plants. Here is a article on it...

Looks mostly cloudy with no amber that I can see yet. I would take it but i like a energetic high. If you are looking for all amber I would wait a week or two and check them again.

Here is a trichome meme

You are better off mixing aeration in beforehand for sure tough one to get in after the soil is mixed especially a no till/ living soil that could be going for years maybe even a decade. So mixing that soil should be done with great care. I like to use a cement mixer to mix up my soils really...

Not going to kill anything but you might get a little slower growth due to less oxygen in the root zone and it will take longer to dry out that's about it.

Probably not with 7.5 water it is a little on the alkaline side but not really enough to make much of a difference in the soil. 6.8 is pretty close to neutral also so doubt it will need much PH up. Maybe you can get away without adding any or add something PH neutral that adds calcium like...

And a Happy New Year ...... Got some 2020 bud brewing day 15 of flower so about 5 or 6 weeks left. Got about 2 gallons of Christmas buds now they are mostly cured. Loving this stretchy ass strain she stretches way the hell out so no need to defoliate but then fills it in with fat buds.