Font this is trouble of Qt, im use Qt 5.8.0

I need paint font "SF UI Display", in main.cpp im load font

Qt Code: 
  1. void installFont() {
  2.  
  3.     QDir dir(":/font/");
  4.     QStringList fontList;
  5.     fontList << dir.entryList();
  6.  
  7.     for (int i = 0; i < fontList.count(); ++i) {
  8.         int res = QFontDatabase::addApplicationFont(":/font/" + fontList.at(i));
  9.  
  10.         if (res == -1)
  11.             qDebug() << Q_FUNC_INFO << "can`t add " << fontList.at(i);
  12.     }
  13. }
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in qml

Qt Code: 
  1. Text {
  2.             id: label1
  3.             anchors.left: parent.left
  4.             anchors.leftMargin: 100
  5.             anchors.top: parent.top
  6.             anchors.topMargin: 100
  7.  
  8.             text: "SF UI Display Light"
  9.  
  10.             font.family: "SF UI Display"
  11.             font.pixelSize: 28
  12.             font.weight: Font.Light
  13. }
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but i see some other font, screen to qml, photoshop ->

https://joxi.ru/4zANB0SBwVOoA9

what im doing wrong ?