condition mean min max 3 h after light 6.09671 5.11955 7.37288 6 h after light 4.578753333333333 3.33391 5.5638 9 h after light 6.554256666666666 5.37093 8.88481 12 h after light 9.94562 8.1539 12.3453 3 h after dark 8.95237 6.58314 11.1209 6 h after dark 8.287166666666668 6.8067 9.2405 9 h after dark 7.37298 5.76227 8.38044 12 h after dark 6.967395 6.37254 7.56225