im growing in promix using grow juice 2-1-3. for vegitative im using 4 45 watt 6500k cfls and for flowering im going to use an 150 watt hps. the growbox is 60 inches wide 30 inches deep an 40 inches high its split into two compartments for veg and flower and yeah will 150 watt hps be enough to flower 4 plants?
No such thing as a 500w. And if you do your research and utilize things like LST and ScrOG...by the time you weed out males, 150w would be enough. If you need an example, stop over in the Indoor Soil section at ICMag. Look at the grow journal titled "Wonder Box" He uses a 250w HPS and pulls down MASSIVE yields for the space and wattage.