The main display and reef tank are both lit by natural sunlight.  The main display also has artificial lighting, but I am not sure about the reef tank.  Nicest aquarium showcase I have ever been to.  The reef tank looked to me like its starting to slowly fill in.  I don't think they want to rush it, who could blame them.  They had some acro slimer colonies, two or three large 3 ft or so red/orange monti cap, green cap, colt, largest RBTA I have seen, and a bunch of other small corals.
For some of us its such a short trip. 
Here are a couple more pics-  
Cold Water Exhibit-
 
Reef tank Pics-
  
 
Feeding time was sweet, the fish new the food was coming.  It appeared to be cyclopeeze, probably a whole bar.
 
 
There 6? million gallon tank-
 
Not sure of gallons but its 3 stories tall and has two whale sharks, a large school of rays "about 100", and a bunch of grouper bigger than me