Three JS - GLTF model is dark - three.js

Question

I have succeeded to load my model into ThreeJS using GLTFLoader but my model is dark. I tried uploading it to glTF Viewer and BabylonJS and it works perfectly there. Here is my javascript code:
const scene = new THREE.Scene()
const camera = new THREE.PerspectiveCamera( 75, window.innerWidth/window.innerHeight, 0.1, 1000 )
const controls = new THREE.OrbitControls( camera )
const light = new THREE.AmbientLight( 0x404040 ); // soft white light
const renderer = new THREE.WebGLRenderer()
renderer.setSize( window.innerWidth, window.innerHeight )
renderer.setClearColor( 0xffffff )
document.body.appendChild( renderer.domElement )
// Instantiate a loader
const loader = new THREE.GLTFLoader();
// Load a glTF resource
loader.load(
// resource URL
'untitled2.gltf',
// called when the resource is loaded
function ( gltf ) {
scene.add( gltf.scene )
gltf.animations // Array<THREE.AnimationClip>
gltf.scene // THREE.Scene
gltf.scenes // Array<THREE.Scene>
gltf.cameras // Array<THREE.Camera>
gltf.asset // Object
}
// loading and error function
)
camera.position.y = 1
camera.position.z = 2
// Vertical
controls.minPolarAngle = 1; // radians
controls.maxPolarAngle = 1; // radians
//Horizontal
controls.minAzimuthAngle = - Infinity; // radians
controls.maxAzimuthAngle = Infinity; // radians
scene.add( light );
const animate = function () {
requestAnimationFrame( animate )
renderer.render( scene, camera )
}
animate()
I tried adding ambient lighting because according to the documentation it is supposed to act as global illumination and changing the background color.
Here is when I upload the model to babylonJS:
Here is when I upload the model to glTF viewer:
And here is when I load it to ThreeJS (it's dark):

Answer 1

Solved it finally! The solution was that I needed to add intensity to the ambient light.