Quote Originally Posted by Puffzter
A HPS is not a cost it is an investment that pays for itself first grow you use it.
I mean if you get just 1 ounce extra both the cost of the light and the extra electricity is for free. And 1 ounce any grower would get extra changing from cfl to HPS.
Even if you will not sell any it is still money you don't have to spend.
Another gain is that the grow is faster with HPS. You save a week or two in veg and probably about the same in bloom.
CFL is great for ops where temperature can be hard to control, they won't save you any money though.
Dude, if that's the case I should be ready to harvest either this weekend or next weekend: flowering time is 6 to 9 weeks, I'm well past 6 weeks going on 7... if the HPS really cuts a week or two from flowering I should be done soon!