files/en-us/web/svg/reference/attribute/pointsatx/index.md
The pointsAtX attribute represents the x location in the coordinate system established by attribute {{SVGAttr("primitiveUnits")}} on the {{SVGElement("filter")}} element of the point at which the light source is pointing.
You can use this attribute with the following SVG elements:
html,
body,
svg {
height: 100%;
}
<svg viewBox="0 0 420 200" xmlns="http://www.w3.org/2000/svg">
<filter id="lighting1" x="0" y="0" width="100%" height="100%">
<feDiffuseLighting in="SourceGraphic">
<feSpotLight x="60" y="60" z="50" pointsAtX="0" />
</feDiffuseLighting>
</filter>
<filter id="lighting2" x="0" y="0" width="100%" height="100%">
<feDiffuseLighting in="SourceGraphic">
<feSpotLight x="60" y="60" z="50" pointsAtX="400" />
</feDiffuseLighting>
</filter>
<rect x="0" y="0" width="200" height="200" filter="url(#lighting1)" />
<rect x="220" y="0" width="200" height="200" filter="url(#lighting2)" />
</svg>
{{EmbedLiveSample("Example", "220", "220")}}
{{Specifications}}
{{Compat}}