Go with daylight spectrum if available(I forget how many kelvin that is), it was irreputability proven on OverGrow to be better than cool spectrum and the warm spectrum in all stages of marijuana development.

It wasn't an overwhelming improvement in growth however mind you, so dont go far out of your way if other flouro types are more readily available.
Hallucinogizer Reviewed by Hallucinogizer on . Add some CFL to 150W HPS cab? I just built a 150 watt HPS cabinet for doing a sea of green grow. I was wondering if it would be worth while to throw in a couple of cool white CFL bulbs too to get some blue spectrum in there? Just a thought, I don't know if it's really worth while, but it would be easy to do. Rating: 5