condition	mean	min	max
4 h after light	21.30435	20.4619	22.1468
8 h after light	15.6198	14.9468	16.2928
12 h after light	16.9727	16.2253	17.7201
4 h after dark	19.358766666666668	18.9995	19.6539
8 h after dark	29.1276	27.6137	30.0688
12 h after dark	25.2542	23.6992	26.0756