condition mean min max 3 h after light 9.78492 7.31125 13.5701 6 h after light 6.66881 4.34022 8.43905 9 h after light 6.1599 5.71481 6.81794 12 h after light 5.88841 3.72883 11.7865 3 h after dark 5.99434 5.39419 6.63055 6 h after dark 7.67739 6.97541 8.09531 9 h after dark 9.544813333333334 7.90574 10.6662 12 h after dark 12.1393 11.4534 12.8252