Its a 430 watt son-agro hps with 2 -65 watt fluorex's giving me added blue spectrum.Works quite well!
It is not so much the cost,but heat.Hps is best for flower and the 430 son-agro bulb emits 30% more blues than standard hps bulbs while the fluorex work awsome for germ/early veg as they operate at a very high kelvin temp allowing light to be placed literally on plants as no heat and they compliment the hps as well with the added blues in flower!
nice, do you trim leaves when you flower, or do the get that dense naturally? also it seems like you can up your wattage to me, i used to go about 35 watts per foot, seems like your about a lil over 20.
Veg/select in 4'x4'(25+ watts per ft) and after slection a 3'x 3' (45+ for flower).No ferts ,added blue spectrum with the 2 fluorex (tight internodes)and will harv .50-.60 per watt.All personel! AND VERY SWEET!