condition	mean	min	max
4 h after light	15.24	14.8673	15.6127
8 h after light	17.8261	16.8118	18.8404
12 h after light	17.362099999999998	16.0387	18.6855
4 h after dark	15.748166666666666	12.8188	17.6483
8 h after dark	12.078933333333334	10.5972	13.4283
12 h after dark	10.85891	7.47563	12.9629