Sickly Auto Berry Ryder

this one plant seems very sensitive. 3 gallon pot FFOF with about 10% perlite added. Was looking awesome until I changed lights to HPS ( due to other three autos flowering) and the last water. No nutrients used on this one as it always seemed to have the claw in the FFOF. The brown spots on end of a few leafs just started.

THOUGHTS?

Too much Nitrogen?
Too much light?
Too much water?

Seems the change in lights are the cause of drooping and it just hates the FFOF...doing better now