condition	mean	min	max
4 h after light	7.35998	7.295089999999999	7.3929800000000006
8 h after light	7.35786	7.2865899999999995	7.40667
12 h after light	7.43509	7.31867	7.5049600000000005
4 h after dark	7.69865	7.67473	7.73125
8 h after dark	7.822023333333333	7.669239999999999	7.91609
12 h after dark	7.699633333333334	7.6169	7.77532