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I need to defer to others on light intensity and spectrum, and if this is what you are referring to..
Lighting Requirements
The Green Star Polyps require moderate to high light. If it is possible, go for higher intensity lighting conditions. More intense lighting often results in brighter more intense coloration.
Actinic blue lighting will bring out the color of your polyps but Green Star Polyps can survive with most types of light. You can also use traditional T5 fluorescent light.
Another light type that may be used are metal Halides, but metal Halides are usually too strong for the polyps and are not recommended. If the light you are using is too strong, you will notice your coral start to go pale and ‘bleach’ themselves.
Strip lights are better for rectangular tanks. Puck styles are better for cube shaped tanks..
If you have cube this seems pretty good for both fish and coral color..
not seeing you "short" on light as long as real watts are over like 15..
you know you never posted the tank dimensions btw..