condition	mean	min	max
4 h after light	18.438306	16.959676	19.916936
8 h after light	18.9391495	18.721211	19.157088
12 h after light	21.054850000000002	18.04684	24.06286
4 h after dark	18.972974	18.029012	19.916936
8 h after dark	21.0719135	19.585754	22.558073
12 h after dark	18.589021	18.589021	18.589021