Which font in the Google Font library looks most similar to Futura Light?
I suggest that you take a look at these font bundles – https://www.templatemonster.com/fonts.php. Their Icon fonts are also great because they are flexible and fast loading.
Raleway http://www.google.com/webfonts/s… is probably the only font in Google’s offering that is anywhere close to Futura Light. Keep in mind, though, that it likely isn’t optimized very well for Windows displays, especially older versions like XP. If readability is important to you, it’s better to use a more professional webfont like FF Super Grotesk Web https://www.fontfont.com/fonts/s… or Futura PT http://typekit.com/fonts/futura-pt — especially under 18px or so. (Of course, you probably don’t want to use a font this light at small sizes anyway.) See this article for more about webfont rendering: http://typographica.org/2010/on-…