Quote Originally Posted by smokejaguar
Cool range vs warm range; blue vs red ; MH vs HPS;,, all this is fine tuning.As far as plants are concerned its all about ,The amount of lumens, and for how many hours.You can use any of these lights exclusively and produce excellent bud.Everything else is personal oppinion, not necessarilly substantiated by fact.-usdi Agaluga
Dude are trying to say the color of the light does not matter and there is no scientific evidence to prove it does? Dude put down the crack pipe man it's doing bad stuff to you man.

That debate was settled over 20 years ago and light spectrum does have a profound effect on plant production.

If that is not what you are saying I apologies; but that is what it sounds like.
Zandor Reviewed by Zandor on . HPS VS. MH Hello, thought i would start a new thread with a question? Is (MH) absolutely necessary for flowering? :rolleyes: I read that HPS will do the same as (MH) And :eek: if i purchased a MH bulb at the depot and put it in the hps ballast will it work? I don't want to buy it if it doesn't work, or will i have to buy the ballast "just" for MH. Thanks for any advice from anyone. :o Rating: 5