condition	mean	min	max
4 h after light	15.530261	15.137114	15.923408
8 h after light	15.16657	13.964245	16.368895
12 h after light	15.9357005	15.067979	16.803422
4 h after dark	17.0374375	13.82475	20.250125
8 h after dark	17.1721315	16.368895	17.975368
12 h after dark	19.045454	19.045454	19.045454