The Light.range property describes the range of each point on the light. However, area lights consist of several light-emitting points, and so the effective range is a bit larger, and depends on the size of the area light. This property returns this larger range. Use this property to find whether a given world-space point will be lit by the area light. If not an area light, then returns the same value as Light.range.

public float dilatedRange { get; }