The materials are given clear and meaningful names.
To adjust or turn off the light, use the Intensity parameter of the "Scribe_light" material.
Good luck with your projects!
Corona physical material

Wall sconces from the same collection - https://3dsky.org/3dmodels/show/nastennaia_lampa_bolia_scribe 

Scribe floor lamp from the same collection -
https://3dsky.org/3dmodels/show/napolnaia_lampa_bolia_scribe 

Scribe pendant lamp from the same collection -
https://3dsky.org/3dmodels/show/podvesnoi_svetilnik_bolia_scribe_pendant_70_130_170