It all depends on preference, environment, and light set up. During veg the plant doesnât care as much about how intense the light is at any given moment(PPFD) as the amount of light it receives in a day (DLI). It doesnât matter how long the light is on as long as itâs long enough to prevent flowering in the case of photos. More than 14 hours is pretty safe. Beyond that you can run the light for a shorter period at higher intensity or a longer period at lower intensity. The only reason I can think of at the moment to run 24 hr light is to keep the tent warm. I run 24 hr to germinate then flip to 18\6 as soon as I have sprouts, but again, it really doesnât matter as long as you balance intensity and duration of light.
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Alright appreciate the input. Iâll just let it ride where Iâm at then.
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Question, so Iâm getting brown spots on top of leaves they are just going into 3 weeks, so no run off or nutes, Iâm assuming lights to close. What are my numbers supposed to be at this point and am I suppose to use direct sunlight or led full spectrum on the photone app
These numbers for both, should I raise the lights some more?
Sunlight 380/23
LED 260/20
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do you have pics? with burple lights youâll use led red/blue
That looks to me like lensing burn from water droplets on leaves, the droplets will act like magnifying lenses.
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Possibly hot soil, possibly from water on the leaves maybe both. Can you get some pics under natural light so we can see the color a little better.
That canât be right, you may have trouble getting an accurate reading with those lights.
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From the pics it looks like you have fresh wet water droplets on leaves, i would use something along the line of a 30mm ish syringe to water around plants so droplets dont wind up on leaves. Nice growing so far @Lightbrightt2010. Been following your thread from the beginning. Keep up the good work 
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Yeah Iâm starting to think itâs from water on the leaves, cause with the humidifier they get really wet so Iâm wondering if that plays a part since they are in such a tight space itâs always pretty warm in there I open it up and let fresh air flow but maybe itâs not enough to cool it down, just weird itâs on the same two leaves of just two of the plants, I did rotate them around today and I did adjust the light again, so as long as no more damage is done to any of the others ill assume that was the culprit and not have the humidifier on so long to the point of the leaves becoming wet. Trial and error, this is why you plant more than one lol
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The little spots on the leaves are from water, the tips could be from water if they are just brown, but if they go from yellow to brown itâs not from the water drops. I just cant tell under the lights.
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Youâre fine, they are just brown no yellow to brown, maybe I wonât do the humidifier cause it makes the leaves really wet so Iâll just let them be dry and hope that doesnât backfire
Dry is better than having water standing on them. It wonât take them long to make their own humidity.
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Works for me, one less thing to pester them about
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I think so. And leaf tips touched wet soil. Not gonna be a problem.
@Lightbrightt2010 them lights canât burn spots by lensing water drops. The leaves donât have hairs to suspend the water drop and it canât happen under contact. Just a grow-myth.
I had an Honorsen like that here, a different spectrum than my other blurple, much more bluish. Photone is tuned for which one, the bluish or the red-biased lamps? One of them has to be way off. Plants look good, raising the light would be ok, and remember dry - wet cycles, itâs ok to let soil dry.
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Hereâs a chart for DLI I use sun direct in the app and if using iPhone you need a filter over the camera.
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Thanks so much, 23 was where I was last night. I moved the lights a little and itâs like 21 now so I may leave it to give them some stretch. Yeah Iâll post pictures later in normal light just in case Iâm missing something, they didnât get watered today also, Iâm feeding every 2 days cause the fabric pots be light as a feather.
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Day 17, everything looks fine minus the couple plants with burnt tips, but hopefully new leaves will outshine them eventually
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OGK and SD 2 just taking they time growing or well have a couple runtz I suppose.
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These seem a lot closer. Just know that any reading you get is a rough approximation. A phone camera doesnât do a very good job of measuring extreme red and blue spectrum. They are designed to work in the yellow natural light. Thatâs why a par meter(measures much wider spectrum 450-700 nanometers.) is hundreds$$$ and a lux meter is $30(measures visible light). They can fill in the blanks with some educated guesses(this is how photone works), but thatâs all they are. The more red and blue light the more guessing involved. all that being said color and stem elongation are good maybe a little tight for my preference, but nothing wrong with that.
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I would agree more with this. I see no evidence of nute burn and It take a pretty strong light like the sun to actually burn them, but the whiteish/tan dots on the leaves seem to be caused by sitting water or leaves that touch and get condensation on them in my experience.
The wavy and deformed lower leaves indicate that that they have had some stresses Likely water on them. Itâs common in seedlings till you get things perfected, but usually clears up in early veg. they are just a little less tolerant to some variable than the others.
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