fgdata/Aircraft/c172p/Instruments/light/light_control.xml

<?xml version="1.0"?>

<PropertyList>

 <path>light_control.ac</path>

<!--     Panel/radio light control    -->
 <animation>
  <type>knob</type>
  <object-name>LightKnob</object-name>
  <proxy-name>LightHotspotLeft</proxy-name>
  <proxy-name>LightHotspotRight</proxy-name>
  
  <visible>true</visible>
  <action>
    <repeatable>true</repeatable>
    <binding>
      <command>property-adjust</command>
      <property>controls/lighting/instruments-norm</property>
      <factor>0.1</factor>
      <min>0</min>
      <max>1.0</max>
      <wrap>0</wrap>
    </binding>
  </action>
  
  <hovered>
    <binding>
      <command>set-tooltip</command>
      <tooltip-id>lighting-brightness</tooltip-id>
      <label>Instrument Lighting: %3d%%</label>
      <property>controls/lighting/instruments-norm</property>
      <mapping>percent</mapping>
    </binding>
  </hovered>
 </animation>

 
 
</PropertyList>