if you are using floro lights, place them as close as you can so the light can penetrate, floros work ok but lose lumens in a short distance.
as for the leaves drooping, trim off some of the lower fan leaves. it sounds to me that they might not be getting enough light, but not a serious problem.
unless you have the light penetration to the bottom branches and leaves, they wil not have the same progressive growth that the upper leaves have.