condition mean min max 4 h after light 262.1 262.1 262.1 8 h after light 241.15 213.7 268.6 12 h after light 265.5 253.1 277.9 4 h after dark 325.3 322.8 327.8 8 h after dark 249.6 244.5 254.7 12 h after dark 215.1 210.0 220.2