Thought I'd update what I got going on. I ran a second batch wo/UVb again, but turned on the UVb supplemental lighting at week 6 of flower (last week on 9/23). In less then a week trichomes have gone from all clear to almost all cloudy. You can still find some clear but not many.

If anyone remembers my last run I never got to amber tric's even at 9 weeks. The White Rhino I'm running usually finishes in 7 1/2 to 8 1/2 weeks, so the addition of UVb at week 6 has made a major difference all ready in "ripening" the current crop.

I need to find a cheap UV light meter so I can start to quantify the amounts of UVb being used. Also, I'm trying to figure out how to do a UVb experiment during vegative growth. I may try something with the Pro-mix grow once I see what we have going on there after the next run is done.
oldmac Reviewed by oldmac on . UVb an experiment Quick background: I have been using UVb supplemental lighting for many years now and have always thought it added to the finished product in a couple of ways. I had never promoted it's use on these boards because I felt it was dangerous and had real potential to harm people. That changed a few months back on the other UVb thread, and I came out of the closet in strong support of it's use. Well some here who's opinion I respect (like Weezard) held the opposite view and those discussions led me Rating: 5