Hey Dog,

In terms of UV B, I've read only one study on it regarding the cannabis plant and the results were equivocal. There seem to be a number of studies on it that I haven't had time to read, but you can get at quite a few of them if you go to scholar.google.com and type in UV-B cannabis. Some of the studies seems to say yes, higher UV-B is correlated with higher levels of THC, so there might be something to it.

I'm not sure what you mean by crowning or whippin' into cotton candy, but the buds on my HDF plant seem to be doing something odd, and that might be it. I can't describe it exactly, but there's something odd about them. Whatever it is, it definitely seems more vegetative than flowering. I'll see if I can get a picture tonight.

As for what is causing it, I'm not sure exactly. I have a hunch that the reason is that the night clock is moving too fast and the plant doesn't sense enough night time, so it's vegging, but as to what the exact cause of that may be, I'm not sure. I have a feeling it's too much Far Red light, and probably not in an absolute sense, just the ratio is probably off.

Keep in mind that I know basically the same amount about these effects as you do, so as much as I want to be able to tell you exactly what's wrong, I really don't know. :-) If I were your uncle and I wanted to optimize my current crop, I'd cut back the far red to probably 50W, throw in all the red CFL you've got (it sounds like it's 50W or less?), keep the HPS at 11on/13off and give the plants one hour of full and complete darkness at the end of the night cycle, before the daylights come on. Again, I really only know as much as you through experimentation, but that's my best guess.

As for the ratio of Far Red:Red in the RedInc bulbs, I think it's about 1.15:1, give or take. I just estimate that from spectral graphs, so your guess is as good as mine. It also depends on what is considered Red and what is considered Far Red (to the plant), because shifting those ranges can change the ratio considerably on the same spectral graph. As for your CFLs being more or less red or orange, I think they're fine. You were using yellow before without any trouble, right?
Mother Reviewed by Mother on . First attempt at a 24-hour "Martian Method" In order to keep track of events, at the request of some online friends, and in order to share the love with the rest of the cannabis community, I'm starting my first grow log using the Martian Method, which I learned about from a very helpful Salmayo, here: http://www..com/vbulletin/showthread.php?t=30203&highlight=Martian and it has also been discussed in another thread on this board, starting at post 1438: http://boards.cannabis.com/indoor-lighting/150174-perfect-led-grow-light-58.html Rating: 5