Font-face mixin属性匹配

Question

我应该在这种情况下更改font-style或font-weight属性吗？

@font-face 
    font-family: $fontLight
    font-style: normal
    font-weight: normal
    src: url('/fonts/#{$fontLight}.eot')
    src: url('/fonts/#{$fontLight}.eot?') format('eot'),
    src: url('/fonts/#{$fontLight}.woff') format('woff'),
    src: url('/fonts/#{$fontLight}.ttf')  format('truetype')