condition	mean	min	max
4 h after light	8.877863333333334	8.81731	8.95213
8 h after light	9.014903333333333	8.9516	9.08513
12 h after light	9.047636666666666	8.9615	9.21846
4 h after dark	8.83458	8.663960000000001	8.97456
8 h after dark	8.68286	8.66232	8.70677
12 h after dark	8.63003	8.4485	8.82125