Patent ID: 8067905

Claim:
A system comprising: a first power potential configured to supply a voltage; a second power potential; a power supply circuit configured for connection to a light source and including a power supply side and a power return side; a power node connected to the power supply side; a current switch connected between the power return side and the second potential, the current switch including an input configured to receive a current switch control signal to place the switch in one of an ON state and an OFF state allowing current to flow through the current switch in the ON state; a preconditioner circuit connected to the first power potential and the power node, the preconditioner circuit including an input configured to receive a preconditioner control signal to place the preconditioner circuit in one of an ON state and an OFF state, wherein the preconditioner circuit is configured to supply voltage to the power node in its ON state and effectively eliminate the voltage to the power node in its OFF state; and a bleed path between the power node and the second potential and configured to shunt all power supplied to the power node when the preconditioner circuit input receives a signal to place the preconditioner circuit in the OFF state.