condition	mean	min	max
4 h after light	7.83943	7.6852800000000006	7.95832
8 h after light	8.154903333333333	7.88572	8.34373
12 h after light	8.212710000000001	7.74065	8.50942
4 h after dark	8.121863333333334	7.777419999999999	8.29533
8 h after dark	7.972123333333333	7.7328	8.13762
12 h after dark	7.98326	7.89233	8.07405