<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>