I have recently acquired a BRT and have 100w 220 led (actual power consumption) 600 w claimed output 2'x 2 coverage grow light and I have it 18" from the canopy. I have it on a humidity tray, I have a little fan and I have a humidifier and after about 10-12 hours the leaves close. Does that mean it's getting too much light? I try to leave in one 15 hours a day but after the leave close is leaving it on doing more harm than good? Some leaves look like they're beginning to burn. I can't imagine 18" is too close or that a sun loving tree such as this is getting too much light. Thoughts? It'll be indoors until summer. It's a young small tree. I live in Seattle area.