condition	mean	min	max
4 h after light	5.9702399999999995	5.90719	6.0714
8 h after light	6.364916666666667	6.16832	6.5323400000000005
12 h after light	6.589813333333334	6.45463	6.83436
4 h after dark	6.428586666666667	6.34375	6.51505
8 h after dark	6.382716666666666	6.2316400000000005	6.627489999999999
12 h after dark	6.17622	6.07111	6.29853