condition mean min max 4 h after light 18.64165 14.8438 22.4395 8 h after light 17.53515 17.0681 18.0022 12 h after light 20.663 20.6457 20.6803 4 h after dark 38.0573 33.8749 42.2397 8 h after dark 24.58455 24.2186 24.9505 12 h after dark 26.6171 24.7819 28.4523