Yeah it was at the top of canopy, but like I said when I was trying to calibrate my phone it said my device isn’t supported so it’s probably very inaccurate.
@low I think I’ll just buy a nice meter online. I don’t trust my phone or these apps.
My math could be totally off, never converted the lux before.
Ppfd meters are an awesome investment if you are wanting to dial in a grow with a little more control.
Anything that will help. Got any recommendations as far as meters go?
I use a photobio ppfd meter, good ratings and supposed to be accurate, relatively inexpensive in comparison to the Apogee which is the most well known, and offers accessories for their meters.
This one is a new on on my radar. Seen this more recently around the forum too.
Bought that one on the bottom. My wife would kill me if I spent 600$ on a light meter haha.
I get it! lol. There aren’t a whole lot of options for ppfd on the market yet, I think that’s why they are so expensive.
Got my meter and calibrated it. Readings are 1100 in the corners of tent and 1363 at the top of the highest cola in dead center. Measuring in mol/m2/s
So I guess now I have a new conundrum with the spots that got bleached/burnt from light intensity. It looks like everything around the bud sites are dying and drying out. I was doing some reading today and it’s said pretty much once it gets to that point there’s no turning back. So my question is should I just chop the branches that have the bad bleaching/burning?
Personally, in a situation where the leaves are on the decline I try to hold out until the sugar leaves begin to get affected. Once they start dying and crumbling you risk them causing mold or attracting pests, plus it’s not the best for bag appeal, or smoke. But I’ve only dealt with this a couple times. See what others have to say.
I say let it ride, like @Low stated.
I’ll snap some photos tomorrow and show you guys.
I’m with @Low
Reading back a bit… if the tops aren’t in the best of shape you should drop your ppfd your current numbers are high, I’d probably lower them to maybe 800-900 average across the canopy. Decrease it even further as you approach the end.
I realized fast with a real meter that it’s pretty easy to exceed a plants light tolerance when you have decent lighting. A lot of sources say plants can’t do much past 900-1000 ppfd. I often see suggestions like 1500. Which is around 64 dli. It’s hard to get past 45 dli or around 1040 ppfd without seeing some sort of impact, at this point your environment has to be pretty dialed in.
Before this meter I was relying on photone and pushing “60 dli” throughout flower with only a few issues. Curious.
My goal is having everything across a canopy fall between 700-1100 ppfd.
Start… Finish… And anywhere in between.
Once in a while, you get shown the light in the strangest of places if you look at it right.
So this is what’s going on in a few different spots. Also none of these are on the tops. There are plenty of other spots that are closer to my light that are not effected.
Light is running 1230 in dead center, if I hit the - again it drops to 930. Should I just run it at the 930 mark? If I run at the 930 mark the corners are showing 700 give or take a little.
This is weird and those leaves are pretty advanced into the problem. Even the pistils look effected…
One thing I can say is we both know the ppfd was high prior to getting the meter.
Idk what to say here… this goes beyond my first aid kit.
Might seem like a weird question but are the problems specifically on one side? Like left or right? Could indicate root related issues…
The range 700-930 will pull solid buds…
Let’s tag in some more people…
Trying to decipher the cause posted in the 2 posts above this one.