Plant problems??

First time grower have 3 clones vegging under 600w hps in ffof had them for about 7 weeks now in veg and transplanted into final pots about a week ago think they might have light burn possibly but they are about 2.5-3ft away from light not sure what's wrong just don't look as healthy as they could some dropping and discoloration and one of the plants leaf edges spike up a bit.. any help appreciated
 

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Spike edges sounds like heat stress. Have you had these plants that far from the light this entire time?
Yeah but not sufficient airflow and no temp/rh reader got additional fan yesterday I believe the temp was reaching about 90 they seem to be doing better already now that I can keep em cool..think u are right.. will post pics with hps off from now on..thanks
 
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