In response to the WPG rule I mentioned briefly. It was a general guideline. Now I'm willing to bet that most people who know the difference in T5, T5 HO, PC, CFL, florescent, led lighting etc also can grow Val.
I'll go out on another limb, and the majority of people who didn't know about val. Probably don't know that much about lighting. So if I was to add 3-4 paragraphs about lighting it with different lights, people would assume it's not for them.
The reality is, any of those light fixtures at 1 watt per gallon with the correct spectrum as a guideline should grow val for them. The fixture isn't even relevant. To be truly accurate I would site a PAR reading at the base of the plant. The only problem is most other people don't have access to a par meter.
In my experience teaching in the aquatic world is best done as general as possible.
To everyone else, get some Val and add some green to your life :idea: