condition	mean	min	max
4 h after light	7.73798	7.4534199999999995	7.919010000000001
8 h after light	7.650073333333333	7.37264	8.01078
12 h after light	7.446073333333333	7.046189999999999	7.710189999999999
4 h after dark	7.634163333333333	7.36235	8.02217
8 h after dark	7.6791833333333335	7.42057	8.03824
12 h after dark	7.61066	7.3174	7.9547300000000005