possible light stress although lights at 50% talk to me People

I’m saying no on light burn, it looks like a nutrient/ph issue in my eyes.. I won’t venture a guess that I’m not confident in - so I can’t give you a specific guess but look up cannabis excess/deficiency chart or examples online as well as Ph issues. If you don’t have a pH pen - it’s a must

I do not rely on the dial. Each light's 50% is different. Instead I downloaded a free light meter app to my phone. It will probably give a reading in LUX. I measure the light at the highest part of the plant. For my HLG white LED lights I divide the LUX number by 65 to get something close to PPFD. Then you can look online for a PPFD chart to see about how much my plant needs at each stage of growth. The correct chart is rectangular with red in the lower right and green in the upper left. Here is one site that has the chart: https://www.ledtonic.com/blogs/guides/dli-daily-light-integral-chart-understand-your-plants-ppfd-photoperiod-requirements Another nice thing with this method is it is flexible. The height of the light or power setting on the dial doesn't matter. If your tent is tall and you want a lot of light bouncing around and providing good power to the side and bottom leaves then you can raise your light higher and turn up the power. If you are running out of height you can allow the plant to get closer to the light and you turn down the power to maintain the correct PPFD for that distance.