condition mean min max 0 h after light 3.9428349999999996 3.58689 4.29878 4 h after light 6.440755 5.833 7.04851 8 h after light 6.5402249999999995 6.36496 6.71549 4 h after dark 6.187315 6.16356 6.21107 8 h after dark 5.473775 5.11405 5.8335 12 h after dark 5.04695 4.97309 5.12081