condition	mean	min	max
4 h after light	7.403216666666666	7.31557	7.55024
8 h after light	7.46576	6.9958100000000005	7.701230000000001
12 h after light	7.30911	7.117189999999999	7.481160000000001
4 h after dark	7.339046666666667	6.87098	7.7731
8 h after dark	7.331923333333333	7.0432	7.524489999999999
12 h after dark	7.009933333333333	6.945539999999999	7.073639999999999