condition	mean	min	max
4 h after light	6.86599	5.91999	7.81199
8 h after light	17.469900000000003	17.0593	17.8805
12 h after light	12.46045	11.6954	13.2255
4 h after dark	17.78235	13.9759	21.5888
8 h after dark	8.00404	7.61808	8.39
12 h after dark	7.077055	6.04165	8.11246