概述　　传统机车司机室灯光亮度是不可调节的。在区间运行时强烈的灯光影响了司机对外部信号和线路的望，关闭照明又违背铁道部有关规定。乘务员有时不得不用其它物品遮光来降低亮度，这导致光线低又不利于记录手账等其它工作。乘务员多次反映，希望司机室灯光亮度可调节， Overview Traditional locomotive cab lighting is not adjustable. Strong lighting in the operation of the interval affected the drivers’ expectations of external signals and lines, and shutting down the lights violated the relevant regulations of the Ministry of Railways. Flight attendants sometimes have to use other objects to reduce the brightness of light, which led to low light is not conducive to record other work such as hand account. Steward repeatedly reflected, I hope the driver’s room lighting brightness adjustable,