[page:Object3D] →

# [name]

Creates a visual aid consisting of a spherical [page:Mesh] for a [page:HemisphereLight HemisphereLight].

## Code Example

`const light = new THREE.HemisphereLight( 0xffffbb, 0x080820, 1 ); const helper = new THREE.HemisphereLightHelper( light, 5 ); scene.add( helper );`

## Constructor

### [name]( [param:HemisphereLight light], [param:Number sphereSize], [param:Hex color] )

[page:HemisphereLight light] -- The light being visualized.
[page:Number size] -- The size of the mesh used to visualize the light.
[page:Hex color] -- (optional) if this is not the set the helper will take the color of the light.

## Properties

See the base [page:Object3D] class for common properties.

### [property:HemisphereLight light]

Reference to the HemisphereLight being visualized.

### [property:Object matrix]

Reference to the hemisphereLight's [page:Object3D.matrixWorld matrixWorld].

### [property:Object matrixAutoUpdate]

See [page:Object3D.matrixAutoUpdate]. Set to `false` here as the helper is using the hemisphereLight's [page:Object3D.matrixWorld matrixWorld].

### [property:hex color]

The color parameter passed in the constructor. Default is `undefined`. If this is changed, the helper's color will update the next time [page:.update update] is called.

## Methods

See the base [page:Object3D] class for common methods.

### [method:undefined dispose]()

Frees the GPU-related resources allocated by this instance. Call this method whenever this instance is no longer used in your app.

### [method:undefined update]()

Updates the helper to match the position and direction of the [page:.light].

## Source

[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]