Today one week has passed, I took no pics for now but I'll arrange to take some.
Existing leaves are longer, one of the seedling had a little new leaf just peaking from the center and it grew from some millimeters to 4 centimeters.
Another seedling put ot a new leaf, very small.
Starting today I watered with Miracle Grow.
These seedling were in a really poor condition, survived to cats and cold and no sun (I could swear one of them was left with no roots from the cat but it's still alive and it's the one that put out a new tiny leaf).
Maybe more heat would help them more, but this is all I can do for now.
The problem is that lights are small and very directional, one should have one light for each pot (this is what I did now).