condition	mean	min	max
4 h after light	8.63937	8.336219999999999	8.9565
8 h after light	8.729856666666667	8.380519999999999	9.065339999999999
12 h after light	8.731553333333334	8.26683	9.17919
4 h after dark	8.607426666666667	7.96335	9.38602
8 h after dark	8.54373	7.9687600000000005	9.298789999999999
12 h after dark	8.467223333333333	8.01469	8.757819999999999