condition	mean	min	max
4 h after light	17.6933475	16.363355	19.02334
8 h after light	18.1554445	17.536395	18.774494
12 h after light	17.0986395	15.930749	18.26653
4 h after dark	18.7076895	17.63105	19.784329
8 h after dark	17.674236	16.200806	19.147666
12 h after dark	18.940604	18.940604	18.940604