condition	mean	min	max
4 h after light	17.61275	14.6432	20.5823
8 h after light	16.3002	15.9484	16.652
12 h after light	20.48125	20.4374	20.5251
4 h after dark	19.6079	19.2702	19.9244
8 h after dark	22.561966666666667	21.6266	23.5733
12 h after dark	18.232166666666668	17.3977	19.4123