condition	mean	min	max
4 h after light	6.28575	6.13071	6.5511099999999995
8 h after light	6.424313333333333	6.10853	6.7909
12 h after light	6.65444	6.31338	7.14084
4 h after dark	6.841426666666667	6.67293	7.067639999999999
8 h after dark	6.6128833333333334	6.45271	6.902839999999999
12 h after dark	6.53067	6.31685	6.882210000000001