Odd yellowing, not heat.

[Gormag]

Ok, here is a pic, she is under an HPS which is in a Cool Tube, the tube is totaly cool to touch and I can hold my hand on it directly with no burn. The top of the plant is about 1in from the tube.

Is this even a problem, or no? I removed the plant from the grow area and placed it under sunlight for 2 days, the yellow went away. Back under the light and new leaves show this..

WTF?

 

[Greyskull]

light burn.... from high light intensity maybe?
try moving the light up a little bit from where it is now.

is it just one plant or a whole crop?

 

[Gormag]

light burn.... from high light intensity maybe?
try moving the light up a little bit from where it is now.

is it just one plant or a whole crop?

Hay thanks, light burn.. ok.. it is just one plant, I only do one at a time. =)

It's a 250HPS in the tube..

I will raise the tube and give that a go.

Does Light Burn cause any problem other than this yellowing?

 

[Greyskull]

it can bleach your buds white... not pretty
i never smoked them (they were a friends... thank good ness!) so i am not sure how they were affected potency-wise.

aside form the burning not sure what else "bad" happens as a result.

8'-10" should be plenty far enough.... good luck yo!