condition mean min max 4 h after light 305.9 305.9 305.9 8 h after light 392.05 357.1 427.0 12 h after light 366.25 315.8 416.7 4 h after dark 242.75 224.5 261.0 8 h after dark 197.8 184.6 211.0 12 h after dark 178.3 166.5 190.1