A headlight 1, for giving, selectively, a main beam and a dipped beam, wherein the relative displacement changes the optical relationship between the reflector and the light source so as to change {HEAD ~ the illumination} given by {TAIL ~ the headlight} between the main beam and the dipped beam 
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A headlight 1 , for giving , selectively , a main beam and a dipped beam , wherein the relative displacement changes the optical relationship between the reflector and the light source so as to change { HEAD ~ the illumination } given by { TAIL ~ the headlight } between the main beam and the dipped beam
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