condition	mean	min	max
4 h after light	7.428405	6.66743	8.18938
8 h after light	7.01389	6.87321	7.15457
12 h after light	8.026075	7.13834	8.91381
4 h after dark	9.556765	9.48816	9.62537
8 h after dark	9.316175	8.93067	9.70168
12 h after dark	9.46413	8.9469	9.98136