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I use a 400W Ushio (it is more intense than a Radium) and have mushrooms and star polyps that both do OK. You may need to acclimate your soft corals for a few weeks and keep them from directly under the bulb. If you can put the bulb 10-12" above the water this will increase the light spread = less intensity in a given area. This will save you money in the long run when you add SPS corals. I am currently testing a 400W Radium bulb and it appears to me to be useable (blue enough for my tastes) without adding actinics which could also save money.
Regards,
Kevin
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SPS Guy
I owe I owe so off to frag I go. On - On
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