She really seems to like the extra light, after lowering light distance and raising light intensity - and she seems to like the living soil that her roots have reached by now. Her weak stem, that couldn't seem to support her leafy head now is very strong and firm, and since her nodes are growing fast and healthy enough, I've topped her on day 17.
She'll get more photons after a day of recovery from this high stress training, and also some mulch, so the topsoil doesn't dry out too quickly.