of visibility to the device under conditions of lowered illumination the additional movement imparted to the reflector 11 causes it to attract attention by the reflected image one embodiment of the reflector 11 is shown in fig3 this particular embodiment is circular in shape with a non reflecting black or dark colored circle 31 upon the surface 32 and adjacent to the edge thereof there are at least two areas disposed within the circle 31 a first area 35 is of a highly visible fluorescent color such as red yellow orange or green such colors are well known in the art and one example is 34 day glo 34 colors marketed under that trademark by switzer bros inc a second area 36 is white or a light color and has a highly reflective surface such that incident light is reflected almost entirely such reflective material is well known in the art one material of this type is described in u s pat no 3 493 403 and is further known as 34 scotchlite 34 marketed under that trademark by the 3m company it should be noted that the circular device shown in fig3 and 4 is typical only the form of the device can be of many different shapes a further embodiment of the present invention can be made of lenticular material 41 as shown in fig4 a lenticule is defined as 34 any of the minute lenses produced as by embossing on the base side of a photographic film serving to record elements of two or more photographic images and used in stereoscopic or color photography 34 by grove p b webster 39 s third new international dictionary p 1294 1971 as used herein the.