Light responsive sign

Claim 1

A DUAL CONTRAST LIGHT REFLECTIVE DEVICE COMPRISING: A TRANSPARENT PANEL HAVING A FRONT AND REAR FACE AND BOUNDING EDGES, INDICIA HAVING A SIDE IN OPTICAL CONTACT WITH THE REAR FACE OF SAID PANEL AND VISIBLE THROUGH THE FRONT FACE THEREOF, SAID INDICIA INCLUDING A LAYER CONTAINING DAYLIGHT FLOURESCENT PIGMENT AND A BACK-UP OPAQUE COATING RENDERING SAID PIGMENT OPAQUE TO THE PASSAGE THERETHROUGH OF LIGHT AND REDIRECTING LIGHT THROUGH THE FRONT FACE OF SAID PANEL, AND SAID INDICIA BEING HIGHLY REFLECTIVE UNDER CONDITIONS OF ILLUMINATION FROM INSIDE THE DEVICE DOMINATING OVER EXTERNAL ILLUMINATION, LINER MEANS ADJACENT SAID REAR FACE OF SAID PANEL AND HAVING AREAS UNOBSCURED BY SAID INDICIA AND VISIBLE THROUGH THE FRONT FACE OF SAID PANEL, SAID LINER MEANS HAVING PORTIONS ABUTTING THE LAYER OF PIGMENT AND BACK-UP COATING AND BEING OBSCURED FROM VIEW THROUGH THE FRONT FACE OF SAID PANEL AND OTHER PORTIONS CONSTITUTING SAID UNOBSCURED AREAS COMPRISING A LAYER OF MATERIAL DIFFUSELY REFLECTIVE TO CONDITIONS OF LIGHT PASSING THROUGH THE FRONT FACE OF SAID PANEL FROM OUTSIDE THE DEVICE, SAID UNOBCURED AREA BEING REFLECTIVE UNDER CONDITIONS OF ILLUMINATION PASSING THROUGH SAID FRONT FACE OF SAID PANEL FROM OUTSIDE SAID DEVICE AND DOMINATING OVER INTERNAL ILLUMINA-