Understandable this question is actually 100% dependent on your set up space, watt, ability to ventilate actual location, natural outdoor environment (ie in flordia no need for heaters in Maine no need for substantial cooling). Me: flower space 10x 10, build around what you have. watt 2 1000 hps digital (they save money) brand does not matter as long as they are air cooled, on a light rail ( why because movement stimulates plants and reaches every area) , ability to ventilate… huge and utilized two 449 cfm fans out of room through homemade active carbon filter , two inline fans venting hoods (buy at hardware store), two intakes to room. All fans other than light fans on timer (digital buy at walmart) to coordinate with CO2 also timer( home made set up), utilize my central air with multiple room settings and set up in grow area room set a 72 degrees through intakes. Median Bcuzz rockwool why bcuzz I like it with red clay pellets( forget actual name) under in 4 in netted pots . In simple flood and drain tables. Res 55 gallon drum why because I had it , pumps two( one to each 5x5 table) mag drive 500 gph pumps why built in filter, submersible, and once again electric efficient on timers. Food General Hydroponics three part simple easy and effective, PPM Tri meter continuously measures temp ppm and ph wonderful tool. Grow style sea of infinite green directly from clone to flower 100 baby girls per 5x5 tight neat and efficient. Genes Bubblegum tray one (why 45 day flower ), Sour Diesel tray two( why because it taste oh so nice) Also I don’t use mylar flat white paint is more reflective. I line my flood trays with pond liner it is the thickest plastic/ rubber I could find (unfortunately very expensive) Any thing else? this is pretty descriptive with a few years in the making and testing