condition	mean	min	max
4 h after light	6.7803249999999995	5.52958	8.03107
8 h after light	8.584795	7.70814	9.46145
12 h after light	18.3921	17.5553	19.2289
4 h after dark	20.351266666666668	19.5156	21.1933
8 h after dark	17.127299999999998	16.1073	17.9152
12 h after dark	16.282533333333333	13.4468	18.5726