Ceiling mounted light refractor

Claim 1

A LIGHT TRANSMITTER FOR USE IN A CEILING LIGHTING FIXTURE BELOW AN ELONGATED LIGHT SOURCE, COMPRISING A SUBSTANTIALLY RECTANGULAR WEB LYING IN A FIRST PLANE AND HAVING AT LEAST TWO OPPOSITE SIDE EDGES FORMED INTO SUBSTANTIALLY DISCRETE V-SHAPED CROSS-SECTIONS LYING IN PLANES AT ANGLES TO SAID FIRST PLANE OF SAID WEB AND SUBSTANTIALLY PERPENDICULAR TO THE PLANAR EXTENSION OF SAID WEB AND PROVIDING STIFFENING FLANGE AREAS ON EACH SIDE, AND LIGHT DIRECTING PRISM MEANS DEFINED ON THE SURFACES OF SAID STIFFENING FLANGE AREAS FOR DIRECTING A PORTION OF LIGHT INCIDENT THEREON UPWARDLY AND OUTWARDLY AROUND THE PERIPHERY OF SAID LIGHT TRANSMITTING MEMBER AND FOR ILLUMINATING SAID STIFFENING FLANGE AREAS, SAID STIFFENING FLANGE AREAS INCLUDING A SUBSTANTIALLY VERTICAL OUTER PORTION, A SUBSTANTIALLY HORIZONTAL BOTTOM PORTION, AND AN INCLINED INNER PORTION, SAID SUBSTANTIALLY VERTICAL OUTER PORTION BEING PROVIDED WITH A PLURALITY OF ROWS OF SUBSTANTIALLY VERTICAL PRISM MEANS FOR LATERALLY DIFFUSING LIGHT INCIDENT THEREON, SAID SUBSTANTIALLY HORIZONTAL PORTION BEING PROVIDED WITH A PLURALITY OF ROWS OF HORIZONTAL PRISM MEANS FOR REFLECTING LIGHT INCIDENT THEREON IN UPWARD DIRECTIONS AND SAID INCLINED INNER PORTION BEING PROVIDED WITH MEANS FOR LATERALLY DIFFUSING LIGHT INCIDENT THEREON.