Need a light for a 3ft wide by 6ft long by 7ft tall room. Currently flowering under cfl's . trying to maintain a perpetual harvest. Have 1 plant in 6th wk , 1 in 2nd wk, and 3 that went in there last night 12/12. Will a 600w do it? What should I be looking for in performance? Ventilation and heat will not be a problem. Bulbs? First indoor grow and thinking I need more light. Suggestions?