condition mean min max 4 h after light 0.0684505 0.0 0.136901 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 4 h after dark 0.0 0.0 0.0 8 h after dark 0.425744 0.0 0.73028 12 h after dark 0.0 0.0 0.0