Hmmm, well my mate is growing a indian skunk plant, and he started it in Oct, so it went through 12/12 as a seedling and now its starting to re-vert to veg.#
He grew it on his window sill and it only has 3 fingers the whole way up. I grew a seedling with 1, yes 1 15 watt CFL and by the 3rd set of true leaves it had 5 fingers, then the next set 7 then 9 at the end...

Im still sticking with it being not enough light, or not close enough.