Significant factors include regulation of line voltage, temperature of the room in which the device operates, temperature control, and condition and age of the lamps.
主要的因素包括：线路电压的调节、设备房间室温、控制的温度、条件以及灯的寿命。
Significant factors include regulation of line voltage, temperature of the room in which the device operates, temperature control, and condition and age of the lamps.
主要的因素包括：线路电压的调节、设备房间室温、控制的温度、条件以及灯的寿命。
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