| 摘要 |
An auxiliary lighting system to be used with a high intensity discharge lamp having a solid state or electronic ballast. An auxiliary lamp is connected to a source of power through the normally closed contacts of a relay. The relay coil is in the input line to the solid state ballast. Above a predetermined threshold current to the ballast, the relay coil causes the normally closed contacts to open thereby extinguishing the auxiliary lamp. When the high intensity discharge lamp is turned on, or when there is an interrupt, the power requirements for the HID lamp are at a low point. Thus the input current to the solid state ballast is below the threshold, the contacts are closed and the auxiliary lamp is turned on.
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