condition	mean	min	max
4 h after light	19.31995	16.8551	21.7848
8 h after light	18.7843	17.7053	19.8633
12 h after light	19.49705	18.9229	20.0712
4 h after dark	23.3185	22.5053	24.1317
8 h after dark	22.4824	21.9686	22.9962
12 h after dark	22.71765	22.7109	22.7244