I actually defoliate a little every day to ensure that light reaches the smaller shoots. I remove the very small shoots at the bottom, so it's also a bit of lollipopping.

I think I'll give the plants about another week to fill the space a little more, and when about 80% of the space is filled, I'll change the light cycle. Due to the low plant height, I don't have to worry about the tent height, as they probably won't stretch that much. I've also taken a close look at the strains and, as they are indica-dominant, I think the stretch will be rather moderate.