This invention relates to a tractor lamp with automatically adjustable light, especialy for walking tractor. In this invention the automatically adjustable light lamp consists of an electronic and a bulb with two group filaments of different voltage and power. The electronic element is used to boost the voltage, to rectify the current and stabilize the voltage, and automatically switches off the two group filaments according to the voltage variations from the dynamo output. As this brings every group filaments into full play, the existentially difficult problem of insufficient light of the lamp in tractor when the engine operates at low speed can be solved. |