condition	mean	min	max
4 h after light	6.487396666666666	6.32226	6.571089999999999
8 h after light	6.12572	5.98615	6.25394
12 h after light	6.19507	6.13011	6.26012
4 h after dark	6.46843	6.05318	6.797739999999999
8 h after dark	6.473156666666666	6.36224	6.66547
12 h after dark	6.65353	6.522419999999999	6.875030000000001