condition	mean	min	max
4 h after light	17454.186485	17273.81273	17634.56024
8 h after light	17356.440635	16479.78751	18233.09376
12 h after light	17619.0584	17564.54945	17673.56735
4 h after dark	18696.30449	17465.9806	19926.62838
8 h after dark	17911.10907	17154.73344	18667.4847
12 h after dark	17931.09441	17931.09441	17931.09441