You know what I was saying about UV before, that UV-A alone may increase potency? Well a couple blacklight CFLs did seem like it may have increased it slightly but it still doesn't seem as potent as it should be, and could even be the same as with no UV for all I know. It's hard to tell subjectively. So anyway now I have to bite the bullet and buy a couple reptile lights to get some actual UV-B and see how that works out. The article I linked earlier about UV did say that UV-A reduces damage done by UV-B though, so apparently it's best to have both. A reptile light also puts out white light so I'll also benefit from a little extra PAR.
The downside of course is the high price of reptile CFLs and the fact that the UV-B drops off so fast that you have to replace them about every 6 months. Oh well, if it makes the difference between mediocre and premium then it'll be worth it. White LED would be good for growing the most weight of vegetable matter but it's not great for production of secondary compounds, like cannabinoids. You'll just get a lot of weak product, something like with original Big Bud.
