Gotta have something green and leafy. One leaf would have worked. A half a leaf may have been enough. No leaves, no growth. Stems don't photosynthesize as far as I know so those 2 are shot.

I have purposely taken a couple of clones on a near death ride because I had the room and the fortitude. Have brought them back from the dark side also, but they all had at least some leaf material to process light.