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If you want to spend $100±, get a Vipar XS-1500 Pro. 313µmol. That's good for seedlings or early veg. You can go even low - cannabis will hang on until 64µmol± - but why so little light?

The growth on the top of those plants is standard growth for a plant in veg. Those are not pre flowers or pistils. This hit me the other day after I'd spent hours guiding you through light levels for a plant in flower stage. That information won't go to waste but it has nothing to do with the...

Yes, gotta top and LST. It just makes like so much easier. And add a trellis. I had a "jungle grow" like that and I remember thinking "Nah, I don't need a trellis." Hah! You've got a right jungle there, amigo. Congrats! Re. increasing nutes in flower - once they've established their...

Wow, that's an excellent price. But, 160 liters — does it chill in gallons? ;-) A 1/10 Active Aqua chiller is almost $500 on Amazon but other brands, like yours, are markedly cheaper. Any idea about the tradeoffs or is it just the brand name?

Looking good! Those are 13 gallons in the tent and what are you using for the container outside?

Ambient temp is a bit low but your temperature + RH is pretty good (45's low - 55% at that temp would make it easier on the plant). I can't help you with the nutes but, just to clarify for other readers, are those white splotches on the leaves or water droplets?

In the first and last photos, it looks like there's something going on with the leaves. The photos aren't very clear. I'd shoot them again and post photos of the entire plant. That would make it easier to diagnose. Also, info about the grow environment. Soil, nutrients, when you water and how...

That's a happy plant! ;-) But it's not in flower. That plant is in early veg and it's looking very happy the way things are. How many days old are the plants? The color is great and the branches are perpendicular to the main stem and the leaves are in their normal orientation. If there was...

Plants are looking pretty good but there are some light spots in the leaves. That's not uncommon for seedlings but, when I look at your RH, that caught my attention. At 26°C and 51%, your tent has the humidity level for late flower. Below is a screenshot of a VPD chart. VPD is similar to "feels...

At 50% and 16-20", your plants are getting seedling levels of light. At 12" and 50%, they're getting about 450µmol which is early veg. I don't know much of anything about your grow but a cannabis plant in early flower will be quite happy with the light output from that light at 100%. Per the...

What were your settings before - hang height and dimmer %?

You must have dated women in SoCal.

In a 3' x 3' tent, I'd go with the Spider SE5000. It's got a very high PPFD, a good PPFD map, and it's pretty cheap. The image below is the PPFD map, the image below that has been modified to support my argument. Spider has done a lot of re-engineering over the past couple of years and if...

And drop the light. At 12" that light is putting out <900µmol which is where cannabis is quite comfortable. The various charts that show giving cannabis 600-800µmol in veg - or worse yet, the silliness that the Photone site talks about - aren't research based. They're very conservative...

I've had a couple of instances of my grow light going to 100%. In each case, it was at that level for about 30 minutes before I noticed it. First time was when I switched on the second rocker switch on a Mars SP 3000. I didn't realize that I'd hit that button and, apparently, it bypasses the...

Yup, you got it. PPFD is across the row and the lux values are in the column headers.

That's not generating much light. "have to" - there's no "have to". It's completely up to you. Cannabis will thrive at very high light levels but it will also grow well at modest light levels. If your hang height is 16", a well setup grow will use 100% but the only thing I know about your...

Lux values are the "10,000", "20,000" etc. in the column headers. The PPFD values are in the body of the table. For the XS-1500 row, 10000lux is 145µmol. Just run your finger across that row and, each time you hit a new column, the table shows you the corresponding PPFD value.

Lux # PPFD Lux is light measured I the green area of the graphic. It's what the human eye sees and lux meters aren't as sensitive to violet or deep red as PAR meters so there needs to be a way to convert LUX to PPFD. Just like Photone does, you have to pick a conversion factor. For the...

The stage of a cannabis plant is a handy guide but that's all. Cannabis is a light whore loves light. Give you plant as much light as it can handle and it will grow incredibly well. The XS-1500 Pro will put out quite a bit of light and, at 16" hang height, you're at about 600µmol. I use word...