condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.173968 0.0 0.347936 8 h after light 0.1745685 0.0 0.349137 4 h after dark 0.3479585 0.0 0.695917 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0