[arch-general] Shutdown and reboot

Please tell me the best way to allow non root user to use halt, reboot, shutdown e t.c. May be set group "power" to this binaries? $ ls -l /sbin/halt -rwxr-xr-x 1 root root 15152 2010-10-02 13:26 /sbin/halt (Not only for me but in distro). No?