condition	mean	min	max
4 h after light	4.029006666666667	3.93569	4.15841
8 h after light	4.106963333333334	4.0096300000000005	4.22797
12 h after light	3.9894499999999997	3.9468300000000003	4.068309999999999
4 h after dark	4.049956666666667	4.0023599999999995	4.07952
8 h after dark	3.9661366666666664	3.9107800000000004	4.01777
12 h after dark	3.9918033333333334	3.94789	4.01996