condition	mean	min	max
4 h after light	7.049516666666667	6.76775	7.3459
8 h after light	6.9234833333333325	6.798189999999999	7.12529
12 h after light	6.9223566666666665	6.664160000000001	7.26322
4 h after dark	6.965859999999999	6.61504	7.28885
8 h after dark	7.0242	6.82345	7.3893
12 h after dark	7.01959	6.775869999999999	7.3426100000000005