Hi all! I've heard that the WPG rule doesn't apply to small tanks so what should I use for my 5g? It came with a bulb that looks yellow when on, almost like a standard living room bulb and it's just a screw in. Can I get something to replace just the bulb not the whole top since it doesn't have a light strip? What kind of bulb would I be best with considering there are plants in the tank. BTW the tank is near a window and gets subtle sunlight all day. Thanks 
