condition mean min max 0 h after light 6.18371 6.12147 6.24595 4 h after light 2.879975 1.8481 3.91185 8 h after light 9.489575 8.88535 10.0938 4 h after dark 11.99485 10.5768 13.4129 8 h after dark 10.148679999999999 9.60156 10.6958 12 h after dark 7.295655 5.64786 8.94345