There are actually two lights, they are archaea 36 watt pc clip lights. The "reef things" are koralia nano powerheads. Not sure why these are associated with marine tanks, as they are the best smaller powerheads I've used for fresh or salt. I've found that maintaining good water movement has been very important with this tank.
So this mean you use the power heads instead of a spray bar for this work? Interesting! I will think of this because my tank is lack of water movement. LOL