condition	mean	min	max
4 h after light	6.116303333333334	5.854830000000001	6.48224
8 h after light	8.206346666666667	7.9759	8.3925
12 h after light	8.47448	8.42741	8.498289999999999
4 h after dark	8.80038	8.57179	9.02083
8 h after dark	8.916336666666666	8.689680000000001	9.08659
12 h after dark	7.332173333333333	6.996689999999999	7.63807