you the current stable for Ubuntu Focal you did not need to use sudo to use the light command but now you do with the current in Jammy
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: i3
DistroRelease: Ubuntu 22.04
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl icp nvidia_modeset nvidia
Package: light 1.2.2-2
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 5.15.0-40.43-generic 5.15.35
Tags: jammy
Uname: Linux 5.15.0-40-generic x86_64
UpgradeStatus: Upgraded to jammy on 2022-05-31 (43 days ago)
UserGroups: adm cdrom dip libvirt lpadmin lxd plugdev sambashare sudo
_MarkForUpload: True
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: i3
DistroRelease: Ubuntu 22.04
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl icp nvidia_modeset nvidia
Package: light 1.2.2-2
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 5.15.0-40.43-generic 5.15.35
Tags: jammy
Uname: Linux 5.15.0-40-generic x86_64
UpgradeStatus: Upgraded to jammy on 2022-05-31 (43 days ago)
UserGroups: adm cdrom dip libvirt lpadmin lxd plugdev sambashare sudo
_MarkForUpload: True
Thank you for reporting this bug and make Ubuntu better!
could you please run: apport-collect 1977484 from a terminal
so relevant system info gets collected into your existing bug
and the developers can help debug you better
Thank you!