public float HemisphericAttenuation { get; set; }

Public Property HemisphericAttenuation As Single
	Get
	Set

public:
property float HemisphericAttenuation {
	float get ();
	void set (float value);
}

member HemisphericAttenuation : float32 with get, set

Property Value

Normal ambient lighting does not depend on the direction of the normal vector of the lit surface. Hemispheric lighting depends on the normal vector and the up vector of the light: A lit surface point is brightest if the normal points is parallel to the up vector, and it is darkest if the normal is orthogonal to the light's up vector or pointing in the down direction.

Reference