Well there is one factor that might
save you a little cash in the long run. You don't have to replace the LEDs anywhere close as often as fluorescent bulbs. F.e. the cree LEDs I used for my build are rated that after 50,000 hours of usage they will emit 80% of the light they originally emitted.
I did this mainly for the fun and learning factor tho. Doing stuff like this yourself is fun stuff