Well...
Well...
Well Biggie, you ask some good questions however:
"Big bucks, but if it serves the purpose and saves a tree, last longer, and is clean and neat how can one discount the benefits?"
Not too sound like a tree-hugger, however how would spending $4K+ for a couple of units really 'save a tree' ? I would expect the raw materials, electricity to manf. etc for a couple of these would far outweigh that of a couple of MH and ballasts. So, no savings there. Last longer? The jury is out, however my understanding is that the oft quoted 100K hours is a technical comment only, and not representative of the actual life of the LED's in this application. What exactly will you have saved if your efficiency and output in PAR/PUR drops to 70% or lower within a couple of years?
This isn't an exercise in bashing the Solaris as much as using common sense regarding current known lifespan and deratings of output.
"It would make sense that the LED lighting would be designed to encompass the widest most common corals needs for lighting or why bother spending the R & D in the first place."
I may very well be wrong, however my understanding is that this fixture uses both white and blue. The blue is at 1 nominal spectral output only, the white probably encompasess several. I will have to check Sanjay's site too see if he did an spectral graph of the output, however Sanjay's comments are not too be taken lightly, his reputation for thoroughness and attention too detail attest too that. Not that he might not be wrong, however if he ranks it close to a 175w, then I'd bet on him being at least rather closer to the truth than not. The difference that may not be mentioned is that he didn't really clarify whether the fact that the LED is a flat source providing a much greater swath of 175w equivilent light compared too just plunking a 175w MH above a tank. I think that is quite likely why many people seem rather happy with them.
"Do all the math you want but if I can raise a thouroughbred on a nags diet then Its the nags diet."
$4000-4500 for tank lighting is not really a 'nags diet', by anyone's assessment. Even you mentioned 'big bucks', no? I think a number of your comments are rather blithely dismissing the main fundamentals of the current discussions regarding LED's and the current fixtures available.
They are insanely expensive, even for the reef hobby.
They don't really have a track record to back-up the investment. And make no mistake about it, this kind of money is an investment, not a simply 300-400 purchase. They probably use more raw materials and electricity and fuel to manf. and ship than alternatives. At this point, I would consider it bleeding edge technology, at a bleeding edge price. If one wants to jump on the train, more power to you. But lets not start spinning yarns about how they are 'currently' much better than MH which have a proven track record, or will save the Earth because they are somehow 'greener'.
I fully expect breakthroughs to continue to come, and probably much more and faster than they have in the past 5 years, considering energy awareness and costs. But they are currently not much more than a very expensive, lower power-lower efficiency lighting source experiment. In a couple of years, most of us will probably have similar 'mainstream' fixtures at 1/3 the cost, with more expensive ones available using 10-15 LED's for enthusiasts.