Are CFL useless? Gelato Sorbet 2nd Grow

I was able to start only from cutting as the seeds of this species are nowhere to be found, my configuration is not very professional, quite the opposite. But putting all the effort and dedication into it, I'm sure I can get good results even with just a CFL and a 40x40 box. For the vegetative phase I decided not to give him fertilizers as the soil I use is prefertilized (biobizz all mix)