condition mean min max 4 h after light 3007.0 3007.0 3007.0 8 h after light 3102.4 2988.5 3216.3 12 h after light 3088.3 2981.8 3194.8 4 h after dark 3155.5 3068.3 3242.7 8 h after dark 2817.35 2816.6 2818.1 12 h after dark 2460.1 2399.2 2521.0