Is this a deficiency?

Leaves around the buds are going yellow. No Fan leaves are going yellow only the ones around bud. temps/RH/PH all within range.

I think it could be a calcium deficiency. But Maybe @MickFoster @Star Dog @curious2garden or @TCH would have a better idea?

Could be from the light.. How close is it?

If it’s just the tops like that I dim my light first and go from there.

Fish scale said:

I think it could be a calcium deficiency. But Maybe @MickFoster @Star Dog @curious2garden or @TCH would have a better idea?

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Not enough information and pictures. It would just be guessing. I did a quick search and saw a plant that looked roughly 5-6 weeks in flower under HPS. Would need natural light pics and a lot more information for the hope of a correct dx.