  <!-- Start circle inside end circle -->
    <radialGradient href="#baseGrad" id="test0" gradientUnits="userSpaceOnUse" cx="200" cy="150" r="100" fx="158" fy="93" fr="10">
    </radialGradient>
  </defs>
  <rect x="0" y="0" width="400" height="300" fill="url(#test0)"></rect>
</svg>
<svg width="400" height="300" version="1.1" xmlns="http://www.w3.org/2000/svg">
  <defs>
  <!-- Start circle outside end circle -->
  <radialGradient href="#baseGrad" id="test1" gradientUnits="userSpaceOnUse" cx="200" cy="150" r