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title: "IES Light"
canonical: "https://documentation.chaos.com/space/VRHINO/116131244/IES%20Light"
format: markdown
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This page provides information on the V-Ray IES Light.
## **Overview**
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Photometric lights utilize an *.ies* file that contains the distribution profile for the light. An* .ies* file contains complete specifications of a real-world light bulb or tube including the shape of the light cone and the steepness of the falloff of the light. Such files are usually provided by the manufacturer of the real-world bulb, and the information in those files, which is gathered through lab experiments, is extremely accurate in its representation of the light source. By loading an *.ies* file, the properties of the light are recreated within Rhino and used by V-Ray during rendering.
IES lights are particularly useful for architectural interior renderings, where it can be important to show the actual result of using specific man-made light sources in the scene.
V-Ray IES light(s) can be instanced by using Array or Alt+drag the light object in the Rhino viewport.
## **UI Paths**
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## **Parameters**
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> Macro (anchor)
### **Example: Intensity**
This example shows how the Intensity parameter affects the IES light.
## **Options**
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## **Notes**
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- Light Color and Intensity may also be adjusted in the Rhino Light Property Panel. If the intensity is set to 0, the value from the .ies file will be used instead.
