I am trying to adapt to the new. So I keep looking into LED lighting. I still dont understand how to choose a fixture. I dont know how to apply the WPG rule. I read that you dont, you just get what you pay for... then i read you can, but i dont see how. I just want a good lighting fixture for my 28g bowfront. I plan to keep plants from this page http://www.aquariumplants.com/Specialty_Plants_s/31.htm. pretty much the medium/high lighting range.