I am sorry if I find the answers are slightly misdirected. How plants react to natural light, including the diurnal and seasonal variation in the spectrum is its natural adaptation to the environment. In the aquarium, especially the indoor aquarium, the plants do not receive natural light but we provide it with artificial light. MH or other incandescent bulbs do provide light very much like natural light (enough like the natural light for the range of adaptness of the plant). Florescent lights do not provide a light like the natural light, but being more efficient, especially the new range of fluorescents, fluorescents are very popular with aquarist. Among aquarium supplies are several premium priced fluorescents.

What I want to know is- has any detailed work on their effect on plants been done? If so where can I find it?