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chromium/third_party/blink/web_tests/svg/filters/feSpecularLight-no-light.html 

<!DOCTYPE html>
<svg>
  <filter id="lightless" x="0" y="0" width="1" height="1">
    <feSpecularLighting lighting-color="blue"/>
    <feColorMatrix values="1 0 0 0 0,
                           0 1 0 0 0.5,
                           0 0 1 0 0,
                           0 0 0 1 1"
                   color-interpolation-filters="sRGB"/>
  </filter>
  <rect width="100" height="100" fill="red" filter="url(#lightless)"/>
</svg>