condition mean min max 4 h after light 11.5687 11.5435 11.5939 8 h after light 10.827 10.5556 11.0984 12 h after light 12.73 12.4554 13.0046 4 h after dark 16.1418 15.144 17.1396 8 h after dark 16.67285 16.068 17.2777 12 h after dark 15.37935 14.1216 16.6371