Thanks for that explanation, spannersatcx!
So if I understand it correctly, there are 4 normal power sources for the annun. lights:
AC Bus1
AC Bus2
AC Ess Bus
and the Static Inverter.
The DC2 Bus supplies power in case you perform a light test.
Am I correct so far?
Would you happen to know what annunciator light is associated with which bus?
Thanks!
Mark