condition mean min max 4 h after light 16.845179 16.174489 17.515869 8 h after light 15.6530825 13.615643 17.690522 12 h after light 14.9265545 12.997636 16.855473 4 h after dark 11.8856745 11.327952 12.443397 8 h after dark 10.666789999999999 10.233214 11.100366 12 h after dark 20.459452 20.459452 20.459452