Quote Originally Posted by Backpacker420
What would be the price difference per month between a 600w and 1000w HPS?
It's impossible for me to generalize cost with any accuracy because I don't know what you're paying per kilowatt hour. The amount used will also fluctuate when you cut back from a 24/0 or 18/6 photoperiod to a 12/12. And, on top of all that, you have the option of going with an energy efficient digital ballast, which has been getting all sorts of raves because of how much power they're supposed to save over the standard core/coil magnetic style ballasts. The magnetic ballast aren't as efficient as their digital counterparts, and many actually pull more power than the bulb is giving off. Digital is much more efficient, and saves you money on your electric bill.

Sorry I couldn't be more help. There's not going to be too much of an increase between the 600 and the 1000, but if you've never grown with HIDs before, it may seem pretty significant. For a 1000W standard magnetic system, look to spend anywhere from $5-15 extra per week on your power bill... which, again, may be higher or lower depending on where you live.
Mr. Clandestine Reviewed by Mr. Clandestine on . 400w HPS vs. 600w If I'm gonna have a grow room approx. 4W x 4L x 6H, and perhaps 2-4 plants, would a 400w or 600w HPS be better? I don't wanna buy a 400w and then always be wondering if I should have gotten the 600w... Rating: 5