condition mean min max 4 h after light 8.737451 8.33599 9.138912 8 h after light 9.473327000000001 8.909101 10.037553 12 h after light 9.4749445 9.10736 9.842529 4 h after dark 9.845987000000001 9.138912 10.553062 8 h after dark 9.108325 9.033226 9.183424 12 h after dark 8.777757 8.777757 8.777757