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# lifetimeRange

The mean value by which the [`lifetime`](/documentation/QuartzCore/CAEmitterCell/lifetime) of the cell can vary. Animatable.

```
var lifetimeRange: Float { get set }
```

## Discussion

If the [`lifetimeRange`](/documentation/QuartzCore/CAEmitterCell/lifetimeRange) is 3 seconds, and the [`lifetime`](/documentation/QuartzCore/CAEmitterCell/lifetime) of the cell is 10 seconds, the cell’s actual lifetime will be between 7 and 13 seconds.

The default value of this property is `0.0`.

---

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