condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.025516 0.0 0.076548 4 h after dark 0.042228666666666664 0.0 0.126686 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0