The present invention relates to an illumination device comprising a base, a U-shaped yoke connected to and rotatable relative to the base and a head connected to and rotatable relative to the yoke. The U-shaped yoke comprise two upstanding arms and the head is mounted between the upstanding arms. The head comprises at least one light source generating a light and the yoke comprises two interlocked U-shaped yoke shell parts. The present invention relates also to a method of manufacturing such illumination device. The method comprises the steps of providing the base, providing the head and providing the yoke where the step of providing the yoke comprises the step of locking two yoke shell parts together across the entire width of said yoke.