Just wondering if one of these bulbs is enough for descent macro algae growth in a 15 gallon sump? If not, any suggestions? It needs to be a standard screw in bulb that lights from the sides of the bulb, not the tip.
http://www.ebay.com/itm/coralife-50...830?pt=LH_DefaultDomain_0&hash=item43bbb2c02e
http://www.ebay.com/itm/coralife-50...830?pt=LH_DefaultDomain_0&hash=item43bbb2c02e