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 0.0554365 0.0 0.221746 3 h after dark 0.0 0.0 0.0 6 h after dark 0.070455 0.0 0.211365 9 h after dark 0.210852 0.0 0.632556 12 h after dark 0.0 0.0 0.0