# AI Relight
## Overview
The Image Editing API allows you to correct lighting issues, such as over-exposition or under-exposition, by re-lighting the input image.
To re-light an image, set the argument `lighting.mode` to either the value:
* `ai.auto` for the lighting to be automatically adjusted
* `ai.preserve-hue-and-saturation` for the lighting to be adjusted while keeping color hues and saturations as close as possible to the original image
* this can be useful for product images, where maintaining color accuracy is important
{% hint style="warning" %}
Please note that AI Relight is currently limited to images with a maximum resolution of 3,500x3,500 pixels.
Known issue: we don't recommend using AI Relight along with [AI Expand](https://docs.photoroom.com/image-editing-api-plus-plan/ai-expand) in a same API call.
{% endhint %}
## Examples
Here are some examples of what re-lighting can achieve by setting `lighting.mode=ai.auto`:
| *Original* | *Re-lighted* |
| :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: |
|  |  |
|  |  |
|  |  |
If you want to give it a try, here's the code to reproduce the examples above:
{% code overflow="wrap" %}
```bash
curl --request POST \
--url https://image-api.photoroom.com/v2/edit \
--header 'x-api-key: YOUR_API_KEY' \
--form imageFile=@/path/to/your/image.jpg \
--form referenceBox=originalImage \
--form maxWidth=2000 \
--form maxHeight=2000 \
--form removeBackground=false \
--form lighting.mode=ai.auto \
--output with-re-lighting.png
```
{% endcode %}
Try it now!
And here are examples of the output produced by the different values for `lighting.mode`:
### Second-hand marketplace
| *Original* | `lighting.mode=ai.auto` | `lighting.mode=ai.preserve-hue-and-saturation` |
| :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: |
|  |  |  |
|  |  |  |
| .jpg?alt=media\&token=8cc24c3c-3b84-4625-8ea0-4fcf471d02b2) | .png?alt=media\&token=a108a7f7-45d6-4e19-8403-6e2cd9dae415) | .png?alt=media\&token=cc7f28ec-b265-4a8c-84f2-93dd8a59469c) |
|  |  |  |
|  |  |  |
### School portraits
| *Original* | `lighting.mode=ai.auto` | `lighting.mode=ai.preserve-hue-and-saturation` |
| :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: |
|  |  |  |
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### Food industry
| *Original* | `lighting.mode=ai.auto` | `lighting.mode=ai.preserve-hue-and-saturation` |
| :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: |
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### Car industry
| *Original* | `lighting.mode=ai.auto` | `lighting.mode=ai.preserve-hue-and-saturation` |
| :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: |
| 
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### Luxury industry
| *Original* | `lighting.mode=ai.auto` | `lighting.mode=ai.preserve-hue-and-saturation` |
| :----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: |
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