condition	mean	min	max
4 h after light	8.1409475	7.600488	8.681407
8 h after light	8.54239	8.06421	9.02057
12 h after light	8.6147875	8.319981	8.909594
4 h after dark	8.3981345	8.376323	8.419946
8 h after dark	8.8771035	8.669703	9.084504
12 h after dark	8.307468	8.307468	8.307468