A method of making an illuminating device such as a flood light or vehicle headlight in which a light source is mounted in a jig including a member for adjustably supporting a plurality of selected small reflectors. Reflectors are selected, mounted in said jig and each reflector is adjusted to direct light impinging on that reflector to a selected area to be illuminated. After having selected and adjusted each small reflector, a matrix is made from the reflecting surfaces mounted in the jig and this matrix is used in a known manner to form male and female dies for forming one or more reflecting devices having facets to reflect light in the same pattern as determined by the adjustment of the selected small reflectors in the jig. The invention also contemplates reflectors made by the novel method.