It depends on what you really want. If you want the plant to produce bigger heads, you lollipop and defoliate " a bit more" but sometimes less is more.......I use my hand and hold it in the middle of the plant and see wether its in darkness or still light/air entering. Just go for and try, maybe with two kinds of the same plant and see for yourself. Looking at your plants, you cold defoliate more, bt yo hold have done this way earlier, at the beginning of flowering. For now I would leave them