condition	mean	min	max
4 h after light	6.41349	6.36704	6.43715
8 h after light	6.456766666666666	6.34324	6.601439999999999
12 h after light	6.39747	6.328530000000001	6.5182199999999995
4 h after dark	6.29504	5.93319	6.59151
8 h after dark	6.209053333333333	6.0867	6.39109
12 h after dark	6.23794	6.00772	6.38753