# Confusing about light building and mobility of lights

**URL:** <https://forums.unrealengine.com/t/confusing-about-light-building-and-mobility-of-lights/625535>\
**Category:** World Creation\
**Tags:** unreal-engine, UE5-0, Level-Design, question\
**Created:** [August 10, 2022, 1:54pm UTC](https://forums.unrealengine.com/t/confusing-about-light-building-and-mobility-of-lights/625535 "2022-08-10T13:54:37Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![AngelBieliukas](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/angelbieliukas/32/88714_2.png) [@AngelBieliukas](https://forums.unrealengine.com/u/AngelBieliukas)\
**Post date:** [August 10, 2022, 6:18pm UTC](https://forums.unrealengine.com/t/confusing-about-light-building-and-mobility-of-lights/625535/4 "2022-08-10T18:18:45Z")

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Ooh, I found the answer in this another forum.

> [@Building Lighting turns objects black. Again](https://forums.unrealengine.com/t/building-lighting-turns-objects-black-again/561808/4):
>
> Problem solved !! The issue was given by the Lumen system in UE5. It doesn’t support light baking and disable all lightmaps !!

Lumen only works with Movable Lights, doesn’t support light baking.  
That’s why everything turns black when you bake lights.

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