condition	mean	min	max
4 h after light	5.617125	4.88997	6.34428
8 h after light	5.207355	4.26815	6.14656
12 h after light	11.0715	10.2602	11.8828
4 h after dark	20.3804	20.1355	20.6253
8 h after dark	18.54665	16.937	20.1563
12 h after dark	11.83475	10.9076	12.7619