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The rated working voltage of the indicator light is 220110, 48, 36, 24, 12, 6, 3 V, etc. Due to the limitation of the current level in the control circuit, and in order to extend the service life of the bulb, it is often adopted to add a current limiting resistor in front of the bulb or use two bulbs in series to reduce the working voltage.
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Zhejiang Incontrol Electric Co., Ltd.