My 20 has been up since May 12. The various ugly blooms seem to be done with, at least for the moment, and I have about 5 different macroalgaes and 3 colors of corraline growing and it's starting to look good.
Some people would definitely assert that the actinics are necessary- I'm a bit sceptical. They certainly do look good. People claim they reproduce the sun's light filtered through ocean water at typical reef depths. I'm inclined to think the appeal is more aesthetic than practical (and may have something to do with the fact that many reefers will pay a LOT of money for lighting equipment, and retailers know that...) I'm still reading about it before I make up my mind.
I don't have a digital cam at the moment- I just took a few shots with my SLR and if they turn out, I'll post them.
Good luck, and if you have any other questions don't hesitate to contact me- I'll share what little experience I have.
don
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