> ## Documentation Index
> Fetch the complete documentation index at: https://dripart-comfy-docs-comfyapi-search.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# AdjustBrightness - ComfyUI Built-in Node Documentation

> The Adjust Brightness node changes how bright an image looks.

The Adjust Brightness node changes how bright an image looks. It multiplies the image's color values by a `factor` and keeps the results within the valid 0.0 to 1.0 range. A factor of 1.0 leaves the image unchanged, values below 1.0 make it darker, and values above 1.0 make it brighter.

## Inputs

| Parameter | Description                                                                         | Data Type | Required | Range     |
| --------- | ----------------------------------------------------------------------------------- | --------- | -------- | --------- |
| `image`   | The input image to adjust. Accepts a single image or a batch of images.             | IMAGE     | Yes      | -         |
| `factor`  | Brightness factor. 1.0 = no change, \<1.0 = darker, >1.0 = brighter. (default: 1.0) | FLOAT     | No       | 0.0 - 2.0 |

Note: If the input image has an alpha channel (RGBA), only the color channels are adjusted. The alpha channel is copied from the input unchanged because it stores transparency, not color.

## Outputs

| Output Name | Description                                                                                                      | Data Type |
| ----------- | ---------------------------------------------------------------------------------------------------------------- | --------- |
| `image`     | The output image with adjusted brightness. If the input has an alpha channel, the alpha values remain unchanged. | IMAGE     |

> This documentation was AI-generated. If you find any errors or have suggestions for improvement, please feel free to contribute! [Edit on GitHub](https://github.com/Comfy-Org/embedded-docs/blob/main/comfyui_embedded_docs/docs/AdjustBrightness/en.md)

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