in a device including a headlight assembly that outputs a beam of light and a lens housing mountable at a forward end of the headlight assembly , an arrangement , receivable on the lens housing , renders the beam of light adaptable to different weather and lighting conditions . in a preferred form , the arrangement includes a plurality of interchangeable filter elements , such as green , blue , yellow , and red elements , that are alternatively receivable on the lens housing , a wide angle lens could also be included among the interchangeable filter elements . the device as a whole could be provided in the form of a packaged collection of elements adapted for subsequent assembly .