condition	mean	min	max
4 h after light	18.191293	14.588171	21.794415
8 h after light	16.7658005	16.449591	17.08201
12 h after light	15.528639499999999	13.591292	17.465987
4 h after dark	18.760167000000003	17.757766	19.762568
8 h after dark	19.2499465	17.173676	21.326217
12 h after dark	18.469957	18.469957	18.469957