If the type is printed in big sizes there can be a much smaller difference between the x-height of the light and the black weight (bottom line drawing).

当字体大字号印刷时，两者的x高度之间的差异就微乎其微了(参见图中下一行)。

youdao

The distinctive, clean black font used to be known as BMW Helvetica, but was changed about three years ago to BMW Type Light, in a refinement barely noticeable to the naked eye.

FORBES: BMW Helvetica Font In Lights