title: Highlighting svg element
body: <p>I have a task to make illumination svg element when you hover the mouse cursor over it. The problem is that the styles of custom elements should not be changed. A light should appear on the sides of the element.</p>
  
  <p>In part I understand that the problem can be solved by using svg filters. Only here can be on top of the element is another element of translucent light and the first to be partially attenuated (so to speak).</p>
  
  <p>Please give advice</p>