<feSpotLight>

<svg
  width="200"
  height="200"
  xmlns="http://www.w3.org/2000/svg"
  xmlns:xlink="http://www.w3.org/1999/xlink">
  <defs>
    <filter id="spotlight">
      <feSpecularLighting
        result="spotlight"
        specularConstant="1.5"
        specularExponent="4"
        lighting-color="white">
        <feSpotLight x="600" y="600" z="400" limitingConeAngle="5.5" />
      </feSpecularLighting>
      <feComposite
        in="SourceGraphic"
        in2="spotlight"
        operator="out"
        k1="0"
        k2="1"
        k3="1"
        k4="0" />
    </filter>
  </defs>

  <image
    href="mdn_logo_only_color.png"
    x="10%"
    y="10%"
    width="80%"
    height="80%"
    filter="url(#spotlight)" />
</svg>