condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.0 0.0 0.0 8 h after light 0.1233165 0.0 0.246633 4 h after dark 0.1189785 0.0 0.237957 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0