| 摘要 |
A ballast circuit and method for operating a lamp includes a lamp preheat/ignition circuit for preheating and igniting the lamp. A ballast controller integrated circuit is operatively connected to the preheat/ignition circuit wherein the lamp preheat/ignition circuit is operatively controlled in a a) preheating mode wherein the lamp is preheated at a preheating frequency for a predetermined period of time; b) a user programmable intermediate ignition mode wherein the lamp is heated at an intermediate ignition frequency that is lower than the preheating frequency; and c) an operating mode wherein the lamp is operated at a final operating frequency that is lower than the intermediate ignition frequency.
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