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 0.0403035 0.0 0.080607 4 h after dark 0.0 0.0 0.0 8 h after dark 0.077989 0.0 0.155978 12 h after dark 0.0 0.0 0.0