Save Money with Cheap Fluorescent Bulbs

An article from the University of Alaska states that, "maximum growth of most plants under cool white fluorescent lights will be equivalent to or better than that obtained under the blue-red phosphors. Some of the names of these special tubes are Grolux, Plant-Gro, Plant Light, Vita Light and Optima. The higher cost of these fluorescent tubes may be justified on experimental or aesthetic grounds, but is hardly warranted on the basis of plant growth."(article)
http://www.uaf.edu/coop-ext/publications/freepubs/HGA-00432.html

The short summary - buy cool white bulbs and save your money.