I did just up my light PPMs so I think it is light burn but I want to make sure it’s not a deficiency like calcium. It only appears on the top of the plant, And nothing on the middle or bottom. Thank you so much
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Not enough info, what type and what wattage is your light? What’s the distance to top of plants?
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LIke @2GreenThumbs said need more info.
Please find and fill out a support ticket.Can someone point him to that page please?
Looks like Cal mag to me if it were light related I believe the top leaves would look bad as well from the pics they do not top leaves would be the hottest hope this helps that’s my thoughts 
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Thank you!
Totally agree with @JJ520 looks like ur n need of some Cal-Mag. Don’t believe it’s light burn because none of ur pistils look to b affected. That leads me to believe it’s a nute issue. More pics n a support ticket would help. A lot.
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Sometimes called “yellow leaf spot” or “leaf septoria,” this condition is caused by a fungus (or sometimes a bacteria) that attacks cannabis plants and usually appears in warm, wet weather.
Thank you so much for that info. I’m going to research this
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