condition mean min max 0 h after light 17.52495 17.2376 17.8123 4 h after light 20.31655 17.3299 23.3032 8 h after light 22.958550000000002 22.291 23.6261 4 h after dark 29.1152 27.9705 30.2599 8 h after dark 24.0275 23.7927 24.2623 12 h after dark 19.1603 18.2988 20.0218