29 gal. sugestions

Well I'm looking for some advice from anyone out there familuar with
29 gallon plant tanks.  After a compromise with my wife we have set up
a pair of 29 tanks in our family room.  Presently I have installed 2-
20 watt florescent tubes over each.  The light does not really look
adequate for good plant growth as I look at it.  Has anyone had great
success using 29 gallon tanks for plants?  And if so what kind of lighting 
did you use?