condition mean min max 4 h after light 8.2173885 8.135792 8.298985 8 h after light 8.2602905 8.253619 8.266962 12 h after light 10.353264 8.901485 11.805043 4 h after dark 9.402296499999999 8.901485 9.903108 8 h after dark 9.5960185 8.986709 10.205328 12 h after dark 7.820455 7.820455 7.820455