Autonomous unit for emergency lighting system for aircraft, eVTOLs, VTOLs and rotorcraft

An aircraft lighting system with integrated cabin lighting and emergency lighting functions configured for use on board an aircraft, the aircraft lighting system comprising plural independent illuminators configured to be used in combination and distributed within an aircraft cabin, wherein each of the plural independent illuminators comprises:

• at least one aircraft light source;
• an ultracapacitor configured to store energy;
• a controller configured to selectively connect the ultracapacitor to the at least one aircraft light source and to control activation mode of the at least one aircraft light source;
• and
• an ultracapacitor health monitoring circuit that includes monitoring of component charge and temperature of the ultracapacitor;
• wherein failure of any one of said plural independent illuminators does not affect operation of any other ones of the plural independent illuminators.