Hmm... they do look stunted.
What soil are you using?
Did you feed them anything?
Thing is that if plants have a hard time in the first 1-2 weeks( could be over/under watering, wrong ph, lack of nuts) they get stunted and they won’t develop properly anymore. It’s usually under-watering that’s more of a problem at this stage.
I would say temps are fine.
The lights are not ideal, but you should see more development even with those FLs.