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Originally Posted by sirichok
Thanks for such useful information and fast response . How deep is your reef tank and what lights do you use ? What is your photo period ?
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No worries!
We have two larger tank with corals, both are around 180 cm deep.
One of the tanks, the better one, we use mostly metal halides. Three 1000 watts and some 400 watts. We are trying out 3 Pacific sun Kryos 300W LED over the other tank, together with 3 Heliospectra LX 600W(for green houses, very much red light). The Kryos is mostly white and blue, and more like a spotlight. Don't spread the light much at all. But it will probably push down some light to 3 meters depth or more, but on a small area.
We might develop a spectra for the Heliospectra LX600W, but it will probably not be ready this year. I can get back with info when I know more.