condition	mean	min	max
4 h after light	20.6839	18.8041	22.5637
8 h after light	15.41395	14.6282	16.1997
12 h after light	14.8614	12.7801	16.9427
4 h after dark	18.3658	16.2759	20.2723
8 h after dark	22.321566666666666	16.4351	29.8501
12 h after dark	20.41443333333333	19.0656	22.4946