t1 = addLight( 0xff0040 );
				light2 = addLight( 0x0040ff );
				light3 = addLight( 0x80ff80 );
				light4 = addLight( 0xffaa00 );

				//light nodes ( selective lights )

				const redLightsNode = lights( [ light1 ] );
				const blueLightsNode = lights( [ light2 ] );

				//models

				const geometryTeapot = new TeapotGeometry( .8, 18 );

				const leftObject = new THREE.Mesh( geometryTeapot, new THREE.MeshStandardNodeMaterial( { color: 0x555555 } ) );
				leftObject.material.lightsNode = redLightsNode;
	