condition	mean	min	max
4 h after light	7.225603333333334	7.173080000000001	7.3203
8 h after light	7.120036666666667	7.01515	7.1807
12 h after light	6.795333333333334	6.56076	6.9958800000000005
4 h after dark	6.8935699999999995	6.8480300000000005	6.918539999999999
8 h after dark	6.563123333333333	6.32477	6.703869999999999
12 h after dark	6.624483333333334	6.42243	6.767760000000001