condition	mean	min	max
4 h after light	18.1237885	17.100739	19.146838
8 h after light	15.998963	15.297159	16.700767
12 h after light	14.090145	12.812466	15.367824
4 h after dark	18.078376	16.332993	19.823759
8 h after dark	18.0339965	15.911094	20.156899
12 h after dark	15.341971	15.341971	15.341971