condition	mean	min	max
4 h after light	8.553306666666668	8.50947	8.60218
8 h after light	8.426583333333333	8.24059	8.608080000000001
12 h after light	8.50347	8.448080000000001	8.54081
4 h after dark	8.70983	8.61024	8.86403
8 h after dark	8.8184	8.66663	9.04727
12 h after dark	8.809886666666666	8.67845	8.94104