The dimming switches control the lights to the various sections of the aircraft.
The green SW/CB switch controls lighting to the switches and circuit breaker area. The Orange controls lighting to the standby instruments. The red controls the pedestal light in the area of the fuel selector valve. The other rotary dial controls to a limited degree, the lighting of the MFD/PFDs.
The battery switch controls a standby battery in case you lose battery or alternator/generator function with the normal primary battery. If you’ve lost the alternator or generator, you’ll only have limited time that the standby battery will support the applicable functions. The engine will continue to work even without a battery thanks to the magneto’s.
Regards