A ballasting circuit is configured with a circuit having a capability of
providing an isolated power supply to various external ballast accessories
that interface with a circuit or device for determining the amount of
illumination. The ballasting circuit also has a capability of providing
isolated power for circuitry within itself such that they can be connected
to communication wires external to a lighting fixture without the need of
an additional power supply. The ballasting circuit includes one or more
gas discharge lighting devices, a source of input power, an electronic
ballasting circuit having a regulated direct current requirement and
coupled between the one or more gas discharge lighting devices and the
source of input power, a heater transformer, a low voltage direct current
power supply, a switching device, a regulator circuit, a full wave
rectifier, and windings.
