I’ve got a curious situation going on. In the roughly year that I’ve grown indoors, one of the lights I’ve used is an HLG 260 rspec that I assembled. It’s worked really nicely the whole time. I’ve grown 3 full grows in the room and am about halfway through vegetative on the 4th grow. The light is 24” away and The light at the top growth is 16,000 lux. The light schedule is 18/6. Day time temp is 81 degrees and night time temp is about 70 degrees. I’ve got an exhaust fan at the top and intake tube down low as well as two small fans for circulation. The tent is 36”x18”x60”.
I don’t have a picture but it’s definitely light burn. The inside of the leaves(not the edges or tips) is turning very light and then brown and finally burned and like paper.
My question is this: has anyone ever run into an LED lamp changing spectrum after about a year of continuous use? I’m pretty sure the intensity can’t increase with age and I test the lux fairly regularly to keep track of the grow. The only thing I can think of is possibly the spectrum is changing. Maybe I’m wrong, but the thing I’m absolutely positive is that the leaves are burning.
Three previous 3 grows had nothing like this.
It first started in the corners of the space. The leaves closest to the corners started showing signs first and then it began to show up on pretty much all of the leaves except for the very center of the tent.