Proper Lighting Intesity?

PRW1988

Fish Gatherer
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Okay, so after about a year and a bit my dad and I have decided to give corals another shot. We're not going to try with the 72gallon like we had before, this time a simple 20gallon Long will be out attempted tank. I can't remember much about the lighting requirements for the coral though. Around what intestity should it be as we need to buy a new lighting system.

I'm not exactly sure, but if I recall something around 20,000K is good for corals? Am I correct? Also, I have a 2.5gallon nano tank that I want to set-up with coral, would a simple dual compact floresent do it for a small frag until we've set the 20Long up?
 

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