Leaves curling partially drying out and discolouring

[MuchGrow]

Hello guys.

HPS 250w. Temp in growcloset is around 32C Don't know how much at tops. Humidity/ph/ppm unknown. 20cm from lamp to tops.

I have plant #1 with leaves curling and partially drying out. and plant #2 with leaves loosing colour.

What is the root/roots of my problems?

 

[Dwight Monk]

I use LED instead of HPS, but that seems awful close to the tops from the light (if my conversion to inches is right).

 

[MuchGrow]

I put it 10 inch away now. What do you think is the proper distance when using 250w?

Thank you for your comment anyway, confirms my thinking.

 

[fanleaf]

Heat stress big time. If your grow room is 32c or 88f your tops are probably about 100f or 50c.
Environment is the biggest key to growing decent plants and you knnow none of the important details so it's a guessing game. Yours is too hot though.