condition	mean	min	max
0 h after light	20.20935	19.2334	21.1853
4 h after light	13.3818	12.1423	14.6213
8 h after light	10.98521	9.30082	12.6696
4 h after dark	17.09585	14.1653	20.0264
8 h after dark	17.02165	16.5038	17.5395
12 h after dark	19.0113	17.5269	20.4957