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Caveat Emptor, there are no binding standards for Kelvin ratings of light bulbs
As a rule the higher the Kelvin rating of a bulb the lower the PAR and lux output.
The other thing to remember is that the way we see visible light may not mean squat to reef inhabitants. The 6500K Iwasakis always seem to score high in PAR(photoactiveradiation) whickh is important for growth. The true actinics that are heavy in light waves in the 420 nanometer, cause awesome floourescence and may be of some use to photosynthic inverts. If you use a couple different lamp types you will prolly be ok, ie MH/VHO or MH/PC
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When considering courage in battle, one should remember that there are 2 sides to every conflict.
The heroism of the losing side rarely gets remembered
but we were all husbands and fathers, sons and bros
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