condition	mean	min	max
4 h after light	6.33142	6.23347	6.47791
8 h after light	6.493803333333333	6.36339	6.62869
12 h after light	6.5410200000000005	6.23805	6.719530000000001
4 h after dark	6.86484	6.76686	6.934639999999999
8 h after dark	6.894686666666667	6.7283	7.060460000000001
12 h after dark	7.112010000000001	6.89785	7.28565