Is this ultraviolet light good for cannabis?

bravedave · Oct 3, 2015

Some answers with pictures:

https://www.rollitup.org/t/the-leprechauns-pot-o-gold.855314/

and

https://www.rollitup.org/t/lets-talk-about-flowering-with-tubes.858094/

c/o @RM3

medicinehuman · Oct 3, 2015

littlejacob said:
Bonjour
So you advise to use UVB for 1 hour during 12/12 to enhance frosting and save a couple of days...!?
And if I use UVB all along the 12/12 it will be ready a week before...but with a bit less gpw...am I correct?
@hotrodharley what is your advice for UVB?
Have a great day ★

I had 78w on for 12/12 and it cut production in almost one half. but very frosty. 26w for the 1to1-1/2 hrs is my spot per plant. the bulbs last much longer at shorter times

Is this ultraviolet light good for cannabis?

bravedave

Well-Known Member

medicinehuman

Well-Known Member