Yellowing on edge of leaves??

Dont think its acutally lightsstress, but your light burns your weakend edges. They can be weakend because: Too much/less water and/or too much /less nutrients and/or wrong RH. But not crucial yet, otherwise you would have other strong signs connected to it. Like dropping leafs, coloring stems, discoloration etc Also try to keep your plants dry, otherwise water on them is like a lense enchancing the light and burning your plant. Also it gets absorbed and when the water is gone there is an oversoaked leafspot, even weaker than before. so there shouldnt be waterpearls on your plant, they will burn it. I even remove everything i dropped after watering with a papertowel, because im at pretty high PPFD too. My plants immediatly burn with liquid on them