How do I quit the light preview?

Super cheese sandwich

Please, see the image attached to understand better.

I'm trying to quit the darkness from a scene. When I create a new light appears a preview of it. How can I quit this? I tried touching all environment options in the render panel but nothing works. Thanks!

jcbunn

CTRL + L

or

click at top where it says Window  then click Preview Lights

Super cheese sandwich

Thanks!