condition mean min max 4 h after light 5.94485 5.24583 6.80378 8 h after light 5.91497 1.73161 10.4444 12 h after light 6.213793333333333 3.41584 8.79924 4 h after dark 6.989443333333333 5.57104 7.79394 8 h after dark 5.237963333333333 3.85958 6.8737 12 h after dark 4.84398 3.47781 6.00092