condition	mean	min	max
4 h after light	6.58094	6.48731	6.7667600000000006
8 h after light	6.55944	6.44749	6.7273
12 h after light	6.350123333333333	6.241569999999999	6.52157
4 h after dark	6.425016666666667	6.12596	6.83668
8 h after dark	6.59162	6.43021	6.68152
12 h after dark	6.5861133333333335	6.46044	6.79368