condition mean min max 3 h after light 0.0 0.0 0.0 6 h after light 0.0 0.0 0.0 9 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 3 h after dark 0.0 0.0 0.0 6 h after dark 0.053111 0.0 0.159333 9 h after dark 0.03915866666666667 0.0 0.117476 12 h after dark 0.0 0.0 0.0