condition	mean	min	max
4 h after light	17.25853	15.960647	18.556413
8 h after light	17.4081585	16.904695	17.911622
12 h after light	18.8295025	18.743298	18.915707
4 h after dark	17.421162000000002	17.227298	17.615026
8 h after dark	19.856786	18.343606	21.369966
12 h after dark	17.911622	17.911622	17.911622