condition	mean	min	max
4 h after light	6.79624	6.78598	6.8128
8 h after light	6.758776666666666	6.647419999999999	6.8688899999999995
12 h after light	6.74255	6.6541	6.89273
4 h after dark	6.684783333333333	6.603739999999999	6.73035
8 h after dark	6.643576666666667	6.55237	6.8228800000000005
12 h after dark	6.721253333333333	6.6682	6.815289999999999