condition mean min max 4 h after light 9.664203333333333 9.361410000000001 9.82667 8 h after light 9.555973333333332 9.44548 9.6235 12 h after light 9.59506 9.44312 9.81273 4 h after dark 9.908853333333333 9.472610000000001 10.14085 8 h after dark 9.66622 9.251439999999999 9.96674 12 h after dark 10.11186 9.65628 10.52612