Some of the newest leaves are starting to yellow from the tips. It’s not all of them mostly just the ones higher up so it leads me to think it’s light related but idk.
Oh and I'd maybe recommend a little bit of epsom salts (perhaps with some added calcium), but basically some calmag + sulphur combo, judging by the look of that...
You are correct, it is light related, lights are either too close, or turned up too high, or both. Fix that problem and they will be fine. Happy growing.