specularConstant

The specularConstant attribute controls the ratio of reflection of the specular lighting. It represents the ks value in the Phong lighting model. The bigger the value the stronger the reflection.

You can use this attribute with the following SVG elements:

Example

html
<svg viewBox="0 0 420 200" xmlns="http://www.w3.org/2000/svg">
  <filter id="specularLighting1" x="0" y="0" width="100%" height="100%">
    <feSpecularLighting in="SourceGraphic" specularConstant="1.2">
      <fePointLight x="60" y="60" z="20" />
    </feSpecularLighting>
  </filter>
  <filter id="specularLighting2" x="0" y="0" width="100%" height="100%">
    <feSpecularLighting in="SourceGraphic" specularConstant="0.8">
      <fePointLight x="60" y="60" z="20" />
    </feSpecularLighting>
  </filter>

  <rect
    x="0"
    y="0"
    width="200"
    height="200"
    style="filter: url(#specularLighting1);" />
  <rect
    x="0"
    y="0"
    width="200"
    height="200"
    style="filter: url(#specularLighting2); transform: translateX(220px);" />
</svg>

Usage notes

Value <number>
Default value 1
Animatable Yes

Specifications

Specification
Filter Effects Module Level 1
# element-attrdef-fespecularlighting-specularconstant

Browser compatibility

desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
specularConstant

See also