https://www.growweedeasy.com/heat-light-stress
"More light is better when it comes to yields, but unfortunately that’s only up to a point. Although it may be tempting to keep trying to move grow lights closer and closer, your plants simply can’t use more light past a certain point!
In fact, if you keep your lights
too close to your cannabis plants, you’ll see bleaching, yellow leaves and nutrient deficiencies, so it’s important to find a balance!"
Note: deficiencies. Spotting, dying leaves. "But I have done this before just like this"
Well good luck then.