condition mean min max 2 h after light 0.0 0.0 0.0 6 h after light 0.0 0.0 0.0 10 h after light 0.0 0.0 0.0 14 h after light 0.0330685 0.0 0.198411 18 h after light 0.061524 0.0 0.369144 2 h after dark 0.0 0.0 0.0