GDL Bulbs (2002-2004): Design: Ballast

An electronic ballast is connected to each headlamp. The ballast functions as a voltage regulator and generates alternative current (AC).

Main tasks: 

1. Light the bulb
2. Control the light during operation.

To light the bulb an initial voltage of approximately 24, 000 V is required for a very short time (less than 1ms).

The ballast transforms the vehicles 12 V (DC) to 1000 V (AC).

The high tension switch amplifies the voltage a further 25 times.

When the lamp is lit the voltage is reduced to the 100 V required to keep the lamp lit.

Power consumption: 10 W.