condition	mean	min	max
4 h after light	6.887133333333334	6.771380000000001	6.9889
8 h after light	6.85333	6.74216	6.948160000000001
12 h after light	6.953556666666667	6.80175	7.09618
4 h after dark	6.770463333333334	6.67789	6.82079
8 h after dark	6.685806666666666	6.44404	6.817589999999999
12 h after dark	6.8816	6.728260000000001	7.07045