condition mean min max 4 h after light 1.58844 1.45642 1.72046 8 h after light 1.42834 1.36608 1.4906 12 h after light 1.2996 1.07668 1.52252 4 h after dark 2.21812 1.24343 3.00514 8 h after dark 2.0435266666666667 1.5112 2.84262 12 h after dark 2.07425 1.93947 2.215