# DirectionalLight - Dimensions?

**URL:** <https://forum.babylonjs.com/t/directionallight-dimensions/27178>\
**Category:** Questions\
**Tags:** lighting, shadows\
**Created:** [January 28, 2022, 5:22am UTC](https://forum.babylonjs.com/t/directionallight-dimensions/27178 "2022-01-28T05:22:22Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Andreas\_Kramling](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/andreas_kramling/32/13143_2.png) [@Andreas\_Kramling](https://forum.babylonjs.com/u/Andreas_Kramling)\
**Post date:** [January 28, 2022, 5:22am UTC](https://forum.babylonjs.com/t/directionallight-dimensions/27178/1 "2022-01-28T05:22:23Z")

</div>

Dear all,

I created a small scenario with 3 walls and one directional light.

Pls see: [https://playground.babylonjs.com/#TC9IWL#6](https://playground.babylonjs.com/#TC9IWL#6)

I do not get, why there is light on the red wall (wall in the middle). According to the hight of the red wall should be completly covered by the shadow created by wall2.

It signficantly improves, if the light source is moved further away.

This means, it seems that light has a certain “size”, correct?  
What is the size? Can it be changed?

Besst  
Andreas

---

<div class="post-metadata">

**Author:** ![slin](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/slin/32/36084_2.png) [@slin](https://forum.babylonjs.com/u/slin)\
**Post date:** [January 28, 2022, 6:36am UTC](https://forum.babylonjs.com/t/directionallight-dimensions/27178/2 "2022-01-28T06:36:55Z")

</div>

This is expected for direction light. See the documentation: [Introduction To Lights | Babylon.js Documentation](https://doc.babylonjs.com/divingDeeper/lights/lights_introduction#the-directional-light)

From the documentation:

> The light is emitted from everywhere in the specified direction, and has an infinite range. An example of a directional light is when a distant planet is lit by the apparently parallel lines of light from its sun.

---

<div class="post-metadata">

**Author:** ![labris](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/labris/32/12576_2.png) [@labris](https://forum.babylonjs.com/u/labris)\
**Post date:** [January 28, 2022, 7:23am UTC](https://forum.babylonjs.com/t/directionallight-dimensions/27178/3 "2022-01-28T07:23:11Z")

</div>

You can check the light frustum in the Inspector

 ![image](https://us1.discourse-cdn.com/flex024/uploads/babylonjs/original/3X/c/e/ce4d397ef17df0f2232eccd509f86102854f45dc.png)