condition	mean	min	max
4 h after light	17.4817	15.5594	19.404
8 h after light	17.1734	16.9774	17.3694
12 h after light	18.17585	14.187	22.1647
4 h after dark	21.4818	20.3532	22.4491
8 h after dark	20.885933333333334	19.9477	21.9781
12 h after dark	20.345399999999998	14.9379	24.4408