ok that is what i think i will do 20/4 i have my light i will be useing a t5 fluorescent tube 4 of them for Veg they omit blue light . And For the Flowering which i have not done i have 2 1000Watt Super High Pressure Sodium with Optimezed Red and blue Spectrum says it uses 146,000 lumens 292,000 lumens that should do good for my FLowering. One of the thing i wanted to ask is what is the BEST Humidity what is the lowest it can go and what is the highest it can be? oo can think for the Help This is my 1st time growing. but i think i have my Ph down so i should be ok. what should be my PPM for my Gem seed ? 200. With my RO there is no Ph or ppm read. Would that be the Best For them ? or should i think that Ph to 6.5 ? with a Ph Upper