Smh not much info is consistent. That can be annoying af. U got to get a ppm reader as well as a ph reader. The ppm will tell u how much “stuff” is in the runoff. Coming out the water from ur plants. U can find a scale online saying how what range ur plant should be in at different stages of growth. When u feed, make sure ur checking the ph after u add nutes to the water, b4 it goes in the soil. Ph it ins the high end of the tolerance. Like 6.8. Idk bout that light but making sure the distance is right too. I see burn but it’s likely from nutes. And a dead leave from no light. I need to do some lst and when u do water, water the edges more than right under the trunk. Temp range should be like 69-82f and humidity 55-70. Don’t over water. It’s ok, even good for them to look thirsty b4 u water them again.