condition mean min max 4 h after light 172.472799 168.312929 176.632669 8 h after light 133.653913 119.693595 147.614231 12 h after light 205.777517 167.280664 244.27437 4 h after dark 175.5554865 156.647379 194.463594 8 h after dark 226.301742 174.983756 277.619728 12 h after dark 247.113657 247.113657 247.113657