how do I use eras light itc?

I have looked a similar question about this, but the answer did not work for me. I tried this code:

font-family: "Eras ITC", "Eras Light ITC",  sans-serif ;

However, my text came out bold, when I was trying to use light. Is there any link I can put in the head like with Google Fonts? I can't have the text bold. The code is on GitHub.