condition	mean	min	max
4 h after light	15.4026	13.0867	17.7185
8 h after light	17.71595	17.5719	17.86
12 h after light	23.89435	23.5079	24.2808
4 h after dark	19.265466666666665	18.7803	20.072
8 h after dark	19.0415	17.049	20.6064
12 h after dark	21.353866666666665	20.925	21.607