are all the lights hanging vertically or do you have some in y splitters? the side of the cfl puts out the majority of the light so having them vertically hanging wastes most of their light, if possible get the lights closer as well, cfls lighting quickly weakens the farther it gets from the bulb. They look small but healthy, nothing to worry about really, just get some y splitters if your not using them yet(which also will allow you to double the number of bulbs your using. which i think you should do personally)