condition	mean	min	max
4 h after light	6.343113333333333	6.04258	6.810219999999999
8 h after light	6.13705	6.0220400000000005	6.28015
12 h after light	6.1080266666666665	5.895169999999999	6.4516800000000005
4 h after dark	6.21354	6.11538	6.36113
8 h after dark	6.13519	5.96341	6.36224
12 h after dark	6.033896666666666	5.92978	6.12955