condition	mean	min	max
4 h after light	8.80878	8.63252	8.95167
8 h after light	7.690853333333333	7.32981	7.966710000000001
12 h after light	8.670353333333333	8.422239999999999	8.806569999999999
4 h after dark	8.894656666666666	8.77027	9.09924
8 h after dark	8.976376666666665	8.846789999999999	9.17002
12 h after dark	8.73722	8.34454	8.96315