low profile lighting??

i am relatively new with planted tanks. have a 120g with a large variety of plants. my canopy houses 4 flourescent bulbs 30w each (2 powerglow, 2 aquaglow) now does that mean that i am only running 1 w/gallon?? the plants are doing well enough, but my larger swords' new growth is more translucent than rich green. i change water and fertilize once a week. am running diy co2, just waiting to get a pressurized system.... Is there such thing as low profile lighting, where i could sneak another 2 fluorescent tubes?? or am i running adequate lighting as is....?? :huh:

plants
sagittaria
mondo grass
swords (micro, osiris, bleheri)
madagascar lace
java fern
anubias
wisteria
ammania gracilis