I think either would produce similar results.
You can always rotate the pots once or twice a day... I've done that before when my grow area was too crowded for everything to get even light. But, I've also used lst to make a fuller, more even canopy. Either way will work.well the birds eye view will ensure equal lighting to the plant but mainly on one side for all three plants
but then the other method will make sure only the plant in the middle gets light from both sides
lst would work great here as two big high powered cfl's are near the plant and penetrating it more
hope im right?