condition	mean	min	max
4 h after light	6.094843333333333	6.02238	6.18136
8 h after light	6.149486666666667	6.0479400000000005	6.29873
12 h after light	6.274	6.14674	6.38821
4 h after dark	6.3919266666666665	6.32416	6.4446900000000005
8 h after dark	6.29719	6.156569999999999	6.41943
12 h after dark	6.31006	6.1737400000000004	6.429930000000001