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Oops. Yeh, that happens. I bought Growcraft lights. Very not cheap. While I was in my (home) office, I saw that the temp in the tent was in the high 80's. When I walked into the garage, there was a huge amount of light in the tent. Turns out that the $10 dimmer in my $600+ light had failed and...

Well, you know what my response will be. :-) Those plants are 30-something days old(?) so 33k lux is right in the middle of the "legacy light levels". A conversion factor of 0.015 is accurate for a "standard" white LED. I've attached a PDF I wrote re. lux to PPFD conversions (it needs some...

No apologies needed. Hope you had a good Father's Day. I had to convert that to Imperial - 36 x 20 x 62". The height could be a factor. Last item first - "quality" = lots of secondary metabolites. Research shows that yield and quality tend increase a light levels increase. And that means...

Thanks for the details. I'm chuckling as I read it because we're dealing with similar problems/needs and going about them in slightly different ways. The quick disconnect makes it easy to move things around. Any issues with leaks? You have a true RDWC meaning a separate res. My set up is one...

Glad to hear that things are going so well. Your grow looks great! Excellent color and the canopy has evened out. VPD is perfect, too. You've been at EC 2.2 for a while so that's the sweet spot. Checked under the canopy and it's dark in there! Do you have fans running under there? And thank...

I'd like to hear your thoughts on mainlining, if you get a chance. Nice that the VPD stays right at 1.0. I'm in Southern California so I can't do a summer grow. July/August will be a challenge for you. I looked up "hot and humid" in the dictionary and it showed a picture of Maryland! :-) I...

Heh, they kicked butt for, what, 18 months. That's quite an achievement. And Mars and Vipar "got nuthin", even now. The Migro light is a more powerful light but it's also almost the same price at a pair of XS 1500's. And it's riding the wave because it's a new generation of light for Migro so...

Perfect!

My first grow (2021) was photos until I drowned not one but two sets of seeds. That cost me calendar time so I found these "autoflower" plants that only take 70-80 days. That was important because I'm in SoCal and, even though I'm about 10 miles from the ocean, my grow is in a garage so I wanted...

As @Thurston has pointed out, that EC is a little high for hydro. The good thing about hydro is that we can adjust nutrient strength very quickly simply by adding RO. Another factor is that VPD plays a much larger role in hydro than when growing in soil. If your VPD was high, that means that...

"old school" - yes indeed. I see you joined in 2012. You've been doing this a while!

That's correct, for people who are using the 500 scale. Here's the skinny on what the different scales are all about.

It looks like the conversion factor is used to convert EC to PPM. If you want to see PPM calculated to the 500 scale, try setting it to .5. EC of 1.0 is 500PPM on the PPM scale which his common in the US and, I think, in Europe. IIRC, the folks in Australia use the 700 scale. EC is the...

Sorry to hear that you had nutrient issue but you did a good job of getting past it. The plants look healthy now. They just need more leaves. :-)

That Hanna pen is a combo meter that reads EC, pH, and temperature. If you want it to display the EC, you should be able to switch the display. Per that page "Selectable EC to TDS (ppm) conversion factor". I don't know what using the 0.45 would do but if you can switch to EC, that will remove...

When you add chemicals to the solution, it will increase EC. Will it be enough to push the plant into toxicity? We can't tell. The plant will tell you when it's too much, so going from 873 to ~1100 might put you into the toxicity range or it might not. VPD can be a major factor in hydro so you...

My 2 x 4 tent is in a 20 x 20 garage. I run a large home dehu in the garage ("Waykar 5000 Sq. Ft Home Dehumidifier with Drain Hose"). That unit has a hose which I run into a 5 gallon bucket since I don't have a drain in the garage. For the tent, I tried a Vivosun first (not a chance), then...

Per my PM, I don't think this is a lighting issue. Even if the PPFD you're getting from the meter is very low (meaning the your plants are getting a lot more light), I think it's more likely that this is a nutrient issue. In the PM, the OP has pointed out that the light coloration is found in...

I see no indication of anything other than a well nourished cannabis grow. You've also pretty much grown out the canopy to cover the entire grow space. That's good to see—no photon is wasted. The Uni-T is sufficiently accurate for most growers and, at 826µmol, you're about 200µmol below where I...

What is it about this light that you find attractive?