A spotlight in Three.js revision 70
Simple example of creating a spotlight in Three.js rev. 70.
var light = new THREE.SpotLight( 0x4aa592, 2, 4500 );
light.position.set( 0, 20, 1 );
light.castShadow = true;
light.shadowMapWidth = 1024;
light.shadowMapHeight = 1024;
light.shadowMapDarkness = 0.98;
scene.add(light);