ok so my suggestion would be to look into a screen of green (scrog) you can put a U scrog in and if you fin or top you will be able to maximize your yeild.if you use a Uscrog I would suggest 2 400 watt mh lights(digital) of course so you can use digital adjustable ballasts so you can run 2 600 watt hps lights for flowering. Angle them so you have a slight overlap in the middle and the light reaches the very edges so you have full saturation of light to all you tops. Ditch the molar and yes flat white is a good reflective paint but an indoor grow store will have rolls of 4mill white reflective plastic that blocks out 100% unwanted light and reflects up to 90% of your grow lights
Scrog is badass but they just came out with a mover that is more like a fan than a rail, meaning it rotates in a circle. Looks rad, might not be brand new, is for this person as just saw in our fav mag,,,, It's rad man, Got the Luxor 2 8 inch and the og growlite. Gonna run the Luxor for flower with a 1000w sHPs hort, and a naked 400 hort blu in between the canopy. And run a 6 esart and 4 blu all hort, for veg, and the good ole t5 for the lil ones