Sounds like you will have plenty of light for the refugium as long as you just keep plants and critters in it. There are so many configurations for tank, sump, refugium it is hard to say whether any are actually any better than others.
I'm also just getting started and my sump/refugium is lined up like this...overflow from display tank into what I will call the sump section where I have the skimmer....sump section over three bubble baffles into a small refugium... and then the flow goes over a single wall into the return section back to the display tank. This sump is only a 20gal aquarium so I had to use space judiciously.
Glad to have you aboard Martin!!! [smiley=2thumbsup.gif]
Drew
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