the other thing to keep in mind is that the colour of the substrate makes a big difference in how much light you need.
I agree, the tanks on here all look great with just the 48" in the middle, but they all have light (light brown) substrates that do reflect a lot of light back up. a really dark substrate like black gravle or eco complete etc. darkens the tank quite a bit
my 150g has black gravel, which makes it darker. here is what it lookes like with twin 36" double T8 fixtures (using hagen powerglo bulbs)
I think if I were to try it, the ends would be fairly dark at the ends, which is you like the effect, is fine of course.:

I agree, the tanks on here all look great with just the 48" in the middle, but they all have light (light brown) substrates that do reflect a lot of light back up. a really dark substrate like black gravle or eco complete etc. darkens the tank quite a bit
my 150g has black gravel, which makes it darker. here is what it lookes like with twin 36" double T8 fixtures (using hagen powerglo bulbs)
I think if I were to try it, the ends would be fairly dark at the ends, which is you like the effect, is fine of course.:
