ctor3 normal] - The normal vector (assumed to be unit length).<br />
			[page:Vector3 target] - The result vector.<br /><br />

			Returns the irradiance (radiance convolved with cosine lobe) in the
			direction of the given normal.
		</p>

		<h3>
			[method:this lerp]( [param:SphericalHarmonics3 sh], [param:Number alpha] )
		</h3>
		<p>
			[page:SphericalHarmonics3 sh] - The SH to interpolate with.<br />
			[page:Number alpha] - The alpha factor.<br /><br />

			Linear interpolates between the given SH and