I'm glad you read the article we recently published in Reefs Magazine --however, you need to read carefully:
" It is possible that well-meaning hobbyists could be over-lighting their aquaria. If we link the rate of photosynthesis to the coral?s growth rate, it is also possible that the effort to grow corals could be slowed (this especially important to coral farmers!). In addition, associated expenses (electrical usage, cooling, etc.) are needlessly high. An investment in a relatively inexpensive quantum (PAR) meter (such as those made and sold by Apogee Instruments, Logan, Utah) might be a wise investment."
Please note Dana's very careful use of the word possible This is one study, of one coral, in one location that collected data that suggests a possible counter-intuitive implication for lighting our systems. While my personal experience leads me to believe that we do often over light our systems --i.e. a 250W halide might do as well or better than a 400w halide in many applications, it is a VERY big leap to assume that we routinely over-light our tanks and that a radical re-orientation of the intensities and time frames that we provide is in order.
Regarding the Pacific Sun fixture, I have no input to provide other than to note that when you say it "blows away" other lights I assume you mean in measured PAR which kind of runs contrary in importance to argument I think you are trying to make.