Using "Light" font weight from a font family doesn't work

[qwasder85]

Hi all,
I'm trying to use the "Segoe UI Light" type of the "SegoeUI" font family in my application, but I don't know how to do it.
I tried all types of "font.weight" and it doesn't change, I can only get it to look "Normal" or "Bold".
The font is installed on my PC, is there a way to directly reference the light font instead of the whole family?

Text
{
    ...
    text: "Test"
    font.family: "SegoeUI"
    font.weight: Font.Thin    // also tried Font.Light and Font.UltraLight
}