Another really good blog on aquarium lighting can be found at ReefBrite titled "The Color of Light" by Tulio Dell: ReefBrite Blog - ReefBrite.com | ReefBrite.com
He makes this very good point..."The bottom line is, while a light source may render a high PAR reading. Its suitability for reef aquarium use is still not certain. The main problem with PAR meters is that they measure photosynethethic energy in specific areas of the red, green, and blue regions simultaneously and do not discern between them. In my opinion the performance and quality of a reef lighting product should never be based on color, brightness or even PAR. Spectral power distribution/spectral intensity completes the circle and when used in conjunction with PAR gives you an accurate picture of the light you are placing over your reef or planted aquaria."
He makes this very good point..."The bottom line is, while a light source may render a high PAR reading. Its suitability for reef aquarium use is still not certain. The main problem with PAR meters is that they measure photosynethethic energy in specific areas of the red, green, and blue regions simultaneously and do not discern between them. In my opinion the performance and quality of a reef lighting product should never be based on color, brightness or even PAR. Spectral power distribution/spectral intensity completes the circle and when used in conjunction with PAR gives you an accurate picture of the light you are placing over your reef or planted aquaria."

