title: How to set width of html5 canvas shadowBlur?
body: <p>The context of an html5 canvas has the following attributes related to setting the shadow:</p>
  
  <pre><code>shadowOffsetX = float
  shadowOffsetY = float
  shadowBlur = float
  shadowColor = color
  </code></pre>
  
  <p>None of which set the width of the shadow.
  Is setting the width at all possible with canvas?</p>
  
  <p>shadowBlur does seem to increase the width, but the blur becomes more opaque.</p>