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Second pass. Clarify API's functionality.

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Ron Hale-Evans 2016-06-14 12:12:26 -07:00
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docs/reference/led/brightness.md
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# Brightness
Find how bright the [LED screen](/device/screen) is.
Find how bright the [LED screen](/device/screen) is _when it is turned on_.
```sig
led.brightness();
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### Returns
* a [Number](/reference/types/number) that means how bright the screen is, from `0` (darkest) to `255` (brightest). For example, the number `127` means the screen is halfway bright.
* a [number](/reference/types/number) that means how bright the screen is when it is turned on, from `0` (darkest) to `255` (brightest). For example, the number `127` means the screen is halfway bright when it is turned on.
### Example: highest brightness
This program makes the screen completely bright if it is not that way already:
This program makes the screen completely bright when it is turned on (if it is not that way already):
```blocks
if (led.brightness() < 255) {