its tough to say how much a 1000 watt bulb will be in energy costs. But in San California, a 1000 watt bulb costs about 30-40 bucks a month to run.

An HPS light is fine if you want to keep it simple. (High Pressure Sodium)....

You will want to make sure your water is PH'ed at 6.5 - 7.0.
You can purchse a ph test kit for a couple bucks at the hydro store...

http://www.plantitearth.com/store/pr...d=304&catid=65

this is a perfect simple kit..

: )