Probably 6" from the light. Canopy temperature around 76ish cuz I keep the room 68-70. Feeding is organic with areated rainwater teas with fulvic acid, molasses guano and work bone meal into the top 2" of soil. Usually twice a week or whenever the pots get light
Here's an easy way to tell if the light is too close to the tops of your plant. Place your hand, palm side down, over the top of a plant and hold it there for about a minute. If the heat is too uncomfortable on the top of your hand, then the light is too close to the plant.. raise the light until the heat is ok on the top of your hand. If it's hot to your hand, just think how hot it is for the plant.
Have you ever considered pH'ing your feeding mixture? The reason I ask is that the average rainwater pH is between 4.3 and 5.6.. this is a pretty low pH to have as a base for your mixture... I'm not saying your rainwater is within these parameters, but it would be beneficial to know your average rainwater pH. Low pH locks out phosphorus and can cause many other different deficiencies, even total nutrient lock-out, to happen in plants.
What are the N-P-K values of the guano and bone meal that you use? Bone meal is a slow-release fertilizer with a good amount of phosphorus in it. Mycorrhizae are needed in the medium to break down the phosphorus so the plant can use it.
