condition	mean	min	max
4 h after light	8.62412	8.24042	8.84118
8 h after light	8.632886666666666	8.05688	8.97074
12 h after light	8.94942	8.48873	9.24743
4 h after dark	8.69815	8.223519999999999	9.02668
8 h after dark	8.617516666666667	8.11481	9.01812
12 h after dark	8.58861	8.06376	8.87407