condition mean min max 4 h after light 0.3368265 0.0 0.673653 8 h after light 0.0 0.0 0.0 12 h after light 0.3332925 0.0 0.666585 4 h after dark 0.0 0.0 0.0 8 h after dark 0.2894 0.0 0.5788 12 h after dark 0.2874445 0.0 0.574889