Nutrient or light burn?

Hello everyone.
I have 2 blue dreams and 1 hindu kush in the flowering period (~4weeks). Yesterday I have noticed some burn spots in the leaves.
I am not sure if it is a nutrient burn or light burn. So, I tried to avoid both problems, I have flushed them and tried to increase the distance between the plants and the light.
Please, take a look at the pics and give your opinions. Thank you a lot in advantage!


The problem is that the Blue dream is too tall (the one in the right of the figure below), it is not fitting very well in my grow haha.

Get sum plant stakes n spread n bend those branches a lil

i would say deficiency not nute burn

I would say not light burn but might be wrong.

Not nute burn... that causes brown, curled tips... not sure about light burn; that seems unlikely...

I saw a very similar effect about light burn in the web.
Take a look

source: https://www.mrgrowit.com/post/light-burn-light-stress-in-cannabis-plants

leonardo_fgr said:

I saw a very similar effect about light burn in the web.
Take a look
View attachment 4933193
source: https://www.mrgrowit.com/post/light-burn-light-stress-in-cannabis-plants

Click to expand...

I retract my earlier statement lol

@Mattcheck hahaha.
I was thinking while taking a look at the grow. I have 2 big LED lamps. And they have a kind of lens that focus the light.
Take a look below. The plants were a bit closer to the lights than it is shown in the figure.
And the leaves that are affected is highlighted in the figure. They were direct on the focused light spot. Whereas the other leaves of the plants seem to be healthy.

If it looks extremely bright on the leaves that burned. Then it's more than likely light bleach.

If it were burn, heat stress would've tacoed the leaves before the leaf burnt.