condition mean min max 4 h after light 2.20265 2.13116 2.27414 8 h after light 2.01753 1.98783 2.04723 12 h after light 1.37065 1.00012 1.74118 4 h after dark 1.67781 1.60731 1.74831 8 h after dark 2.19461 2.11676 2.27246 12 h after dark 2.333495 2.13326 2.53373