Is this the beginning of light bleaching❓

I’m pushing her with a mars hydro tsw2000 @ 5”, so I just raised it to 8” I know this is low however I’m trying to push hard

Looks like it to me

No. bleaching is white, more likely a deficiency and get a Lux meter to remove guesswork and set LED light @ 30K Lux from canopy and about 50K Lux for HPS

budman111 said:

No. bleaching is white, more likely a deficiency and get a Lux meter to remove guesswork and set LED light @ 30K Lux from canopy and about 50K Lux for HPS

Click to expand...

Wouldn’t the deficiency appear on the leaves though? & I’m definitely looking for that pulse par meter to go on sale for 420

it's kind of hard to say...it might be bleaching, but most likely, it's just normal new growth. Sometimes new growth just looks more yellow than usual, the pistils look fine so I think that's what it is.

Light bleaching is rather rare

Zero reason to run your lights that close. It's not pushing them hard, it's stressing them out.

Manufacturer recommendation for hanging height is no less than 12".

Herb & Suds said:

Light bleaching is rather rare

Click to expand...

So is hanging lights 5 inches above a canopy.

twentyeight.threefive said:

So is hanging lights 5 inches above a canopy.

Click to expand...

Missed that one

Light poisoning lol.
Looking at the mars website it sez ~ 18" for flowering

I'd say 20" away would be better.
Ì use around 800 - 1000 umols for flowering with leds.

Moflow said:

Light poisoning lol.
Looking at the mars website it sez ~ 18" for flowering
View attachment 4881981
I'd say 20" away would be better.
Ì use around 800 - 1000 umols for flowering with leds.

Click to expand...

That chart is a joke, no way those lights are putting out 1122ppfd @ 18” if I flowered at that height, I would have popcorn nugs galore

I’ll play it safe at 12” but I fell as though 10” would be fine

Dreminen169 said:

That chart is a joke, if I flowered at that height, I would have popcorn nugs galore

Click to expand...

So you think light bleaching but refuse to adjust lights?
Good luck

I’ve had it at 5” since the beginning of flowering and am only just starting to see this happen

Herb & Suds said:

So you think light bleaching but refuse to adjust lights?
Good luck

Click to expand...

Post #2 & #13

its better for the plant to receive a more even par rather than extremely high in the middle and less on the sides. you could end up stressing her to the point of growing nanners. i dont have the light your using and im new on smds but what i do know is lights too close will cause a myriad of issues.
usually taco will be first and droop. then crisping and bleaching. the plant will fight to stay healthy but will loose eventually. shes using energy on repair/protect rather than weight so you could in fact be doing the complete opposite of what youre trying to.accomplish. if you want to push it then a light meter is key. you can download a simple one on your phone but i wouldnt consider it the be all end all measurement.

What are the leaf,flower surface temps at these aforementioned mentioned 5” and 10"? I have one of these lights and I'm shocked that you're using the full 300 watts and still have plants. You checked wattage pull right? If not then all the earlier discussions are moot. Have a good one. TC

Dreminen169 said:

I’ll play it safe at 12” but I fell as though 10” would be fine

Click to expand...

Well since you know better than the manufacturer go for it. Let us know how it turns out.

What size space are you using that to flower? I'm going to guess 4x4?

Dreminen169 said:

That chart is a joke, no way those lights are putting out 1122ppfd @ 18” if I flowered at that height, I would have popcorn nugs galore

Click to expand...

You ever see a commercial indoor grow?
They use led's high above the plants and they do not get "popcorn"
Never seen one at less than a foot over canopy