The z attribute defines the location along the z-axis for a light source in the coordinate system established by the primitiveUnits attribute on the <filter> element, assuming that, in the initial coordinate system, the positive z-axis comes out towards the person viewing the content and assuming that one unit along the z-axis equals one unit in x and y.
You can use this attribute with the SVG elements described in the sections below.
<fePointLight>For <fePointLight>, z defines the location along the z-axis for the light source in the coordinate system established by the primitiveUnits attribute on the <filter> element.Value <number>Default value 1Animatable Yes
<feSpotLight>For <feSpotLight>, z defines the location along the z-axis for the light source in the coordinate system established by the primitiveUnits attribute on the <filter> element.Value <number>Default value 1Animatable Yes
<svg viewBox="0 0 420 200" xmlns="http://www.w3.org/2000/svg">
<filter id="diffuseLighting1" x="0" y="0" width="100%" height="100%">
<feDiffuseLighting in="SourceGraphic">
<fePointLight x="60" y="60" z="10" />
</feDiffuseLighting>
</filter>
<filter id="diffuseLighting2" x="0" y="0" width="100%" height="100%">
<feDiffuseLighting in="SourceGraphic">
<fePointLight x="340" y="60" z="50" />
</feDiffuseLighting>
</filter>
<rect x="0" y="0" width="200" height="200" filter="url(#diffuseLighting1)" />
<rect
x="200"
y="0"
width="200"
height="200"
filter="url(#diffuseLighting2)" />
</svg>