This browning on my Thai Con started just this week… I haven’t changed up her watering. I water her once a week but USUALLY I try to go with bottom watering (is that not enough?) She has a grow light in front of her for 12-13 hrs a day and I just added a grow light above her again for 12 hours. She has a humidifier nearby and it’s consistently between 50-60% humidity……. Any ideas? Is this common because of the white coloring on the leaf?