Trying to keep environment at steady 26 degrees and night temps don't go much lower in this tent at the moment. Humidity always between 50% and 70% until last 2 weeks of flowers kept at 45%-60%.
I also foliar spray a mix of about one Liter RO water with 1ml Cal-Mag+ B-52 2ml; foliar spray when possible between once to 4 times a day until 2nd week of flower.
Third grow and I use :
Vivosun Metal Halide Conversion on 600W Digital Dimmable Ballast and Air Cooled Hood
-Inert Medium Promix Organik - https://www.pthorticulture.com/en/products/pro-mix-mp-biostimulant-plus-mycorrhizae-organik/
-5 gallon Felt Pot - Vivosun 5-pack
-For my grow I use Advanced Nutrients Sensi line with additives Voodoo Juice, B-52, Big Bud.
-Zero Water Filters - 2.5 gallon Dual Filter Tub