condition	mean	min	max
4 h after light	7.30931	6.49111	8.12751
8 h after light	7.223855	6.8398	7.60791
12 h after light	8.15059	7.82036	8.48082
4 h after dark	15.773333333333333	15.1184	16.6302
8 h after dark	11.002093333333333	9.52968	11.8369
12 h after dark	10.22396	9.24427	11.6507