(under subclass 53) Subject matter wherein the motion transmission means includes a rigid crank rod directly connected to the rotatable lamp or lamp support to pivot the lamp or lamp support about an axis and a rigid movable member connected to the crank rod so that the motion of the rigid movable member received from the movable steering member or the movable shaft or the movable member receiving the motion from the shaft or the movable rod, causes the crank rod to pivot the lamp or lamp support about the axis.