condition	mean	min	max
4 h after light	7.000416666666667	6.915260000000001	7.07338
8 h after light	6.8617099999999995	6.780689999999999	6.94089
12 h after light	6.965613333333333	6.9073199999999995	7.008719999999999
4 h after dark	7.275790000000001	7.0667800000000005	7.495410000000001
8 h after dark	7.2296466666666666	7.06775	7.352289999999999
12 h after dark	7.244343333333333	7.07428	7.43112