Sorry, I have been asking so many questions lately, but still in the phase of trying to learn things. What kind of light do I need for the refugium? I am planning to put some LR and algae plants such as cheato. I mean do I need actinic light? 10000K light? 6700K light? how many watts per gallon do I need? And also how many gallons of refugium is probably good for 55 gallons display tank. Thanks.