condition mean min max 0 h after light 7.1111 6.52692 7.69528 2 h after light 8.842875 7.47535 10.2104 4 h after light 6.51726 6.40024 6.63428 8 h after light 18.0943 17.7533 18.4353 12 h after light 20.83755 19.6733 22.0018 2 h after dark 11.19275 10.7017 11.6838 4 h after dark 9.863109999999999 9.41642 10.3098 8 h after dark 11.452649999999998 9.6116 13.2937 12 h after dark 7.887935000000001 7.34503 8.43084