condition	mean	min	max
4 h after light	17.3880485	15.795154	18.980943
8 h after light	18.9492815	18.773223	19.12534
12 h after light	15.4747175	13.902163	17.047272
4 h after dark	17.3324855	14.588357	20.076614
8 h after dark	16.5042035	15.041797	17.96661
12 h after dark	16.990495	16.990495	16.990495