cool tubes are where it is at!
Monkee, if you do the math on a 250 watt HPS you will find that it is about the sweet spot for square foot to wattage ratios and not be too bleeding hot for the limited height you have... specially with a cool tube on it... if you had more height i would lean towards the 400 so you could grow into it in a future tent.... but a cool tube on the 400 would make it cool enough for your height probably... anyway, that is my opinion... CFL's do work, but they are a lot of work and they just dont have the horse power that HPS has.
it is as if HPS was designed to grow buds
Monkee, if you do the math on a 250 watt HPS you will find that it is about the sweet spot for square foot to wattage ratios and not be too bleeding hot for the limited height you have... specially with a cool tube on it... if you had more height i would lean towards the 400 so you could grow into it in a future tent.... but a cool tube on the 400 would make it cool enough for your height probably... anyway, that is my opinion... CFL's do work, but they are a lot of work and they just dont have the horse power that HPS has.
it is as if HPS was designed to grow buds