I have grown a lot of plants over the years in aquaria of similar
size. You can get good growth with just a couple of 20 W fluorescents
(Gro&Sho or Vitalites, for example) to supplement some natural sunlight.
However this is much less flux that most plants would receive outdoors,
so you might get spindly Sarracenia. Many Drosera would be happy,
though they may stay rather green. In contrast to my
marine reef tank, where a few hundred watts of metal halide lamps
is required to keep things happy, the CP collection is quite
energy efficient!
-Dave Britt