condition	mean	min	max
4 h after light	5.928026666666667	5.84125	6.0159
8 h after light	6.22391	6.04362	6.39427
12 h after light	6.054123333333334	6.01966	6.100230000000001
4 h after dark	6.106973333333333	5.88661	6.4147099999999995
8 h after dark	6.2917266666666665	6.07724	6.585039999999999
12 h after dark	6.28174	6.19779	6.38281