Is the attitude gyro (artificial horizon) equipment on our DA40NG aircraft powered by electricity?
While reading the flight manual of the plane, I saw an article about the emergency switch:
"by switching the EMERGENCY switch ON, if
installed, the emergency battery, if installed will supply power
to the attitude gyro (artificial horizon) and the flood light"
This article confused me because I thought attitude gyro (artificial horizon) equipment was backup equipment that works with "gyro" without electricity. Then I thought that the intended attitude gyro (artificial horizon) equipment could be the digital attitude gyro on the PFD, but with the image I shared below, I understood that it was not meant.
So my question is, is this attitude gyro (artificial horizon) equipment powered by electricity? Also, wouldn't it be more reasonable and logical for the emergency battery to support the digital display in the PFD instead of feeding this equipment with electricity? (Also, in my opinion, it would make more sense to feed instrument light instead of flood light.)