condition	mean	min	max
4 h after light	20.897629000000002	18.76172	23.033538
8 h after light	17.966763	17.207706	18.72582
12 h after light	16.760243000000003	16.31278	17.207706
4 h after dark	14.930133	14.477362	15.382904
8 h after dark	15.466084	14.051099	16.881069
12 h after dark	17.913198	17.913198	17.913198