condition	mean	min	max
4 h after light	19.2666295	18.58864	19.944619
8 h after light	21.197136999999998	18.823405	23.570869
12 h after light	18.570742	18.09603	19.045454
4 h after dark	20.5811445	19.045454	22.116835
8 h after dark	17.658426	16.959676	18.357176
12 h after dark	19.045454	19.045454	19.045454