I have a thirty five gallon hexagon aquarium, with live plants which are okay, but they could be better. I have a strip light that came with the aquarium, 20" long, takes a 15 watt bulb. I have looked at ahsupply.com and saw their 13 watt retrofit for existing strip lights, I dont know if that would be enough. However, money is tight for me, is there a way to retrofit the strip light my self to have say, another 15 watt bulb in there as well? Does it sound feasible?