condition mean min max 0 h after light 36.2405 35.7556 36.7254 4 h after light 16.43395 16.0311 16.8368 8 h after light 17.63995 17.4933 17.7866 4 h after dark 31.7367 29.5878 33.8856 8 h after dark 30.4595 29.8029 31.1161 12 h after dark 32.7074 32.5431 32.8717