ok well consider your options

tubes = more coverage( for same wattage) can get closer due to heat distribution over a greater area , and would fit nicly in your area.

compact = more intense heat. but more intense light ( more wattage in same space) may be alittle harder to rig.

but basicly there the same thing....

the main thing i would consider is how long are you going to keep them under these lights.... if your only gonna keep em there till there a few inches tall... then i would go with the tubes. because it should provide enough light for small plants and it will have alot less heat and will be esier to rig up... if your going to grow them to 1-2 ft under those lights , then i would go with the compact... that way you can get more light power( to handle bigger 1-2 ft plants) and you can start with a few Cfls and add as your plants get bigger( down side is more time needed to rig this together)