those plant won't grow faster, they stretch, that is what they do if the grow on a window sill....
if you want to go all the way cfl you have to get to kinds, 6500K/cool white for the veg and 2700K warm white for the flowering. be advised, yield with this normally sucks
and if you want to grow with the sun, get outside, find a spot well hidden with much light and expect some 6-9ft giants even with indica heavy strains.
if you want to stay insides the window sill is no option, trust me