Babylon.js/Playground/scripts/lights.js

var createScene = function () {
    var scene = new BABYLON.Scene(engine);

    // Setup camera
    var camera = new BABYLON.ArcRotateCamera("Camera", 0, 0, 10, BABYLON.Vector3.Zero(), scene);
    camera.setPosition(new BABYLON.Vector3(-10, 10, 0));
    camera.attachControl(canvas, true);

    // Lights
    var light0 = new BABYLON.PointLight("Omni0", new BABYLON.Vector3(0, 10, 0), scene);
    var light1 = new BABYLON.PointLight("Omni1", new BABYLON.Vector3(0, -10, 0), scene);
    var light2 = new BABYLON.PointLight("Omni2", new BABYLON.Vector3(10, 0, 0), scene);
    var light3 = new BABYLON.DirectionalLight("Dir0", new BABYLON.Vector3(1, -1, 0), scene);

    var material = new BABYLON.StandardMaterial("kosh", scene);
    var sphere = BABYLON.Mesh.CreateSphere("Sphere", 16, 3, scene);

    // Creating light sphere
    var lightSphere0 = BABYLON.Mesh.CreateSphere("Sphere0", 16, 0.5, scene);
    var lightSphere1 = BABYLON.Mesh.CreateSphere("Sphere1", 16, 0.5, scene);
    var lightSphere2 = BABYLON.Mesh.CreateSphere("Sphere2", 16, 0.5, scene);

    lightSphere0.material = new BABYLON.StandardMaterial("red", scene);
    lightSphere0.material.diffuseColor = new BABYLON.Color3(0, 0, 0);
    lightSphere0.material.specularColor = new BABYLON.Color3(0, 0, 0);
    lightSphere0.material.emissiveColor = new BABYLON.Color3(1, 0, 0);

    lightSphere1.material = new BABYLON.StandardMaterial("green", scene);
    lightSphere1.material.diffuseColor = new BABYLON.Color3(0, 0, 0);
    lightSphere1.material.specularColor = new BABYLON.Color3(0, 0, 0);
    lightSphere1.material.emissiveColor = new BABYLON.Color3(0, 1, 0);

    lightSphere2.material = new BABYLON.StandardMaterial("blue", scene);
    lightSphere2.material.diffuseColor = new BABYLON.Color3(0, 0, 0);
    lightSphere2.material.specularColor = new BABYLON.Color3(0, 0, 0);
    lightSphere2.material.emissiveColor = new BABYLON.Color3(0, 0, 1);

    // Sphere material
    material.diffuseColor = new BABYLON.Color3(1, 1, 1);
    sphere.material = material;

    // Lights colors
    light0.diffuse = new BABYLON.Color3(1, 0, 0);
    light0.specular = new BABYLON.Color3(1, 0, 0);

    light1.diffuse = new BABYLON.Color3(0, 1, 0);
    light1.specular = new BABYLON.Color3(0, 1, 0);

    light2.diffuse = new BABYLON.Color3(0, 0, 1);
    light2.specular = new BABYLON.Color3(0, 0, 1);

    light3.diffuse = new BABYLON.Color3(1, 1, 1);
    light3.specular = new BABYLON.Color3(1, 1, 1);

    // Animations
    var alpha = 0;
    scene.beforeRender = function () {
        light0.position = new BABYLON.Vector3(10 * Math.sin(alpha), 0, 10 * Math.cos(alpha));
        light1.position = new BABYLON.Vector3(10 * Math.sin(alpha), 0, -10 * Math.cos(alpha));
        light2.position = new BABYLON.Vector3(10 * Math.cos(alpha), 0, 10 * Math.sin(alpha));

        lightSphere0.position = light0.position;
        lightSphere1.position = light1.position;
        lightSphere2.position = light2.position;

        alpha += 0.01;
    };

    return scene;
}