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

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

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

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