Additional lighting

[jeg]

I have a 37 gallon reef. Right now I have a 110W of PC lighting. Any ideas on what I should do to get more? I dont think I could fit another 4" wide fixture on top of the tank. Should I get a single PC to pump in another 55W?

 

[striker]

Check out hellolights.com. They have some nice retrofits for good prices. 3 55watt strips would be ok but it might limit what you could keep.