# Light

Custom machines support light emission, to make your machine emit light you will need to define the `light` property inside the machine `appearance` property.

The `light` property define the light the machine will be emitting.

The light level must be an integer between 0 and 15 (defined by vanilla, a torch emit 14 and a redstone torch 7 for example).

Example :

```json5
"appearance": {
    "light": 15
}
```

{% hint style="info" %}
The default light is 0.
{% endhint %}