condition mean min max 4 h after light 2.323475 1.89353 2.75342 8 h after light 1.995755 1.89321 2.0983 12 h after light 2.6859149999999996 2.61663 2.7552 4 h after dark 4.639659999999999 4.23363 5.04569 8 h after dark 3.6937550000000003 3.67742 3.71009 12 h after dark 2.943915 2.67545 3.21238