condition	mean	min	max
4 h after light	8.4213305	8.250177	8.592484
8 h after light	7.806104	7.362031	8.250177
12 h after light	7.527204	6.804231	8.250177
4 h after dark	7.7504615	7.250746	8.250177
8 h after dark	8.370489	8.250177	8.490801
12 h after dark	7.976156	7.976156	7.976156