Normally, I use \"Helvetica Neue\" for the fonts in some websites although looking at other sites, I\'ve seen some with \"HelveticaNeue-Light\", \"Helveti
Assuming you have referenced and correctly integrated your font to your site (presumably using an @font-face kit) it should be alright to just reference yours the way you do. Presumably it is like this so they have fall backs incase some browsers do not render the fonts correctly