Actually I think most here agree that less light is usually better for many. In fact one of the more knowledgeable and well-known members here I'm pretty sure links that Tropica study you linked all the time.
I just don't agree with generalized, sweeping statements when it comes to home aquaria. Tanks to me are not controlled science experiments. There are simply to many variables tank to tank, light to light, substrate to substrate, etc. I do believe the Evans tank used MH lighting in addition to the T5, but I could be wrong.