It's great that stylesheets are included by default in lightning experiencem but where do we access the icon svg resources. Lightning experience loads the svg in what looks like a different way than we are provided with.
For example a lead icon url looks like this: "https://cs62.salesforce.com/img/icon/t4v35/standard/lead_120.png" how can we get access to the standard svg icons without loading static resources or is it best practice to load them from a static resource?