Hi Sami! Here's "what" One/you/anybody "need's" to grow Indoor; Let's assume your space is 4X4X 76", O.K.? Optimal temp. in that space would be 82%, however; Cannabis will tolerate more/higher temp. IF; You've got a source of; CO2 (The Exhale or other). Intensity of Light? 400W minimum for that above space. I use MH and SPS Bulb's; cheaper than the newer bulb's and tested for many decades. Also use a variable; 50%, 75%, 100%; "Energy Saving Electronic Ballast"; "usually" set at 50%! why? even 75% for this Grow tent is really HOT! (Tent from GrowAce.com) my "water" is filtered thru a Zero Filter, and mixed with one simple "Feed"; "Oneness" from Humboldt Nutrients, and i do follow directions; so at week 12 i use two teaspoons per gallon. I do not "flood" (over-water) the Plants. Lastly i do NOT submit these Girl's to more than 12-14 hours of light! What happens in Nature? 24 hours of light? I think not.