condition	mean	min	max
4 h after light	6.954983333333334	6.51818	7.23085
8 h after light	6.81077	6.5749699999999995	7.02337
12 h after light	6.8255099999999995	6.3365	7.366039999999999
4 h after dark	6.74378	6.29318	7.41851
8 h after dark	6.72812	6.21988	7.44446
12 h after dark	6.741996666666667	6.30604	7.0516