condition	mean	min	max
4 h after light	19.116455000000002	16.961989	21.270921
8 h after light	21.524753	19.661787	23.387719
12 h after light	20.2698745	17.803183	22.736566
4 h after dark	18.3858445	17.109902	19.661787
8 h after dark	21.423716499999998	16.96363	25.883803
12 h after dark	22.800789	22.800789	22.800789