After they dried out and i posted pictures, someone on the forum told me to replace my teracotta tiny pots for larger plastic (don't dry out as quickly) pots. good advice! when i transferred them i lost some roots which stuck to the pot and some which were hugging the stones at the bottom (i guess because i watered them from below some times).

they are getting 16 hours weak sunlight/ basic daylight at this point of time. through a window, direct sunlight for about 3 hours in the day, but a very bright room with basically all windows.

i bought a bulb. basic CFL which is 10 times the size i thought it would be compared to what i originally had in my head. it's the length of my forearm and the width of calves. it's a 6400 (i think?) which was suggested on the forum as a flowering light, but could support veg.
they now get 16 hours of daylight/ sunlight 5 days a week and two days of the week get 5 hours topped with the CFLs. i put them in the cupboard and give them the CFL light.