Shriveled tops curling upwards yellow tips

batwood0378

Member
So my tops are having a slight yellow fringe and also shriveled and curling up just a bit. They seem happy other than this. Any ideas please?
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batwood0378

Member
Light wattage and distance from the affected areas? Pictures in normal light needed for better advice.

the lights are running at 600w currently about 60” above the plants room is running around 75-77 degrees with average 60% humidity
 

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