condition	mean	min	max
4 h after light	6.8873033333333336	6.627260000000001	7.20423
8 h after light	6.903459999999999	6.639939999999999	7.389819999999999
12 h after light	6.911373333333334	6.61413	7.192539999999999
4 h after dark	7.4675633333333336	7.1875800000000005	7.95973
8 h after dark	7.366743333333334	7.10775	7.84123
12 h after dark	7.122333333333334	6.79236	7.6482600000000005