The specularExponent attribute controls the focus for the light source. The bigger the value the brighter the light.
You can use this attribute with the following SVG elements:
<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" filter="url(#diffuseLighting1)" />
<rect
x="220"
y="0"
width="200"
height="200"
filter="url(#diffuseLighting2)" />
</svg>For <feSpecularLighting>, specularExponent defines the exponent value for the specular term.Value <number>Default value 1Animatable Yes
For <feSpotLight>, specularExponent defines the exponent value controlling the focus for the light source.Value <number>Default value 1Animatable Yes