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The specularExponent attribute controls the focus for the light source. The bigger the value the brighter the light.

Two elements are using this attribute: <feSpecularLighting> and <feSpotLight>

<svg viewBox="0 0 420 200" xmlns="http://www.w3.org/2000/svg">
  <filter id="diffuseLighting1" x="0" y="0" width="100%" height="100%">
    <feSpecularLighting in="SourceGraphic" specularExponent="1">
      <fePointLight x="60" y="60" z="20" />
    </feSpecularLighting>
  </filter>
  <filter id="diffuseLighting2" x="0" y="0" width="100%" height="100%">
    <feSpecularLighting in="SourceGraphic" specularExponent="5">
      <fePointLight x="60" y="60" z="20" />
    </feSpecularLighting>
  </filter>

  <rect x="0" y="0" width="200" height="200" style="filter: url(#diffuseLighting1);" />
  <rect x="0" y="0" width="200" height="200"
      style="filter: url(#diffuseLighting2); transform: translateX(220px);" />
</svg>

feSpecularLighting

For <feSpecularLighting>, specularExponent defines the exponent value for the specular term.

Value <number>
Default value 1
Animatable Yes

feSpotLight

For <feSpotLight>, specularExponent defines the exponent value controlling the focus for the light source.

Value <number>
Default value 1
Animatable Yes

Specifications

Specification Status Comment
Filter Effects Module Level 1
The definition of 'specularExponent for <feSpecularLighting>' in that specification.
Working Draft No change
Filter Effects Module Level 1
The definition of 'specularExponent for <feSpotLight>' in that specification.
Working Draft No change
Scalable Vector Graphics (SVG) 1.1 (Second Edition)
The definition of 'specularExponent for <feSpecularLighting>' in that specification.
Recommendation Initial definition for <feSpecularLighting>
Scalable Vector Graphics (SVG) 1.1 (Second Edition)
The definition of 'specularExponent for <feSpotLight>' in that specification.
Recommendation Initial definition for <feSpotLight>

See also

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