I'm not so sure for two reasons..
One, we are dealing with inches in an aquarium as opposed to feet or even meters in the ocean
And two, sunrise and sunset are very red to our eyes as we stand on the beach because we can look to the horizon and see the colors of the sunset/rise reflect back at us. But what is directly over head is blue sky. I think the corals under the water 'see' significantly more blue than is apparent above water..
The reds, yellows, oranges are filtered out pretty quickly by sea water after several feet, leaving some greens and then mostly blues traveling to depth and hitting corals- in the wild.
Granted the shallow water corals may 'see' more of the warm spectrum, it is always the bluer end that penetrates....
This is just my opinion.... I am not a scientist, by any means and I would LOVE to hear other people's opinion on this..
It is clear that corals respond much more favourably to the bluer end of be spectrum and we know that photosynthesis takes place at a blue and green peak.
Making the aquarium light 'look' like a natural day to us as we stand on the beach may not (IMO) be what the corals 'see' in a natural day under the water..
I'd really like to have feed back on this... I am really curious to know how others feel..
Fishmommy, I think that the new Mitras 6200 addresses this issue. The Radion is a nice light but I think that he Mitras is a better all around performed..