Where should I place the sensor for humidity/temperature? I see huge differences depending on the spot, I have placed the sensor now slightly below the top leaves - above the lamp directly hits and it has 4 degrees (celsius) more!
At same time , few month ago Ultraviolet said that he monitors at 3 levels.
I had one at top of canopy and one around roit zone. Plus in few corners. I grew in tin can aka static , so was needing extra monitoring.