A 600 watt HID light in a cabinet, only 7 ft tall?...would require SERIOUS ventilation, to keep the temps under 85 degrees.

You would need a cool tube...IMO

I would choose a 250 watt HPS/MH switchable light and go for 3-4 flowering females....max. Even a 400 watt light...is pushing the envelope.

Good Luck..:thumbsup: