Outdoor lighting equipment

Claim 1

FOR A LUMINAIRE HAVING A LIGHT SOURCE AN LIGHT-TRANS MITTING MEANS HELD BY SUPPORT MEANS IN LIGHT-TRANSMITTING RELATION TO THE LIGHT SOURCE, IMPROVED LIGHT-TRANSMITTING MEANS COMPRISING, A BOWL-SHAPED, FORM-RETAINING ELEMENT MADE OF A TOUGH, WEATHER-RESISTANT, TRANSLUCENT PLASTIC MATERIAL, SAID ELEMENT HAVING AN INNER SIDE AND AN OUTER SIDE, A BOWL-SHAPED FILM MADE OF A HEAT-RESISTANT, TRANSLUCENT PLASTIC MATERIAL, SAID FILM HAVING A THICKNESS OF AT LEAST ABOUT 1 MIL AND BEING SUBSTANTIALLY OPAQUE TO ULTRAVIOLET RADIATION, SAID FILM BEING SEPARATE FROM SAID ELEMENT AND BEING REMOVABLY INSERTABLE WITHIN SAID ELEMENT, SAID ELEMENT AND FILM BEING DIMENSIONED AND CONFIGURED TO BE MOUNTED IN LIGHT-TRANSMITTING RELATION TO THE LIGHT SOURCE OF A LUMINAIRE WITH WHICH THEY ARE ADAPTED TO BE USE WITH SAID INNER SIDE DISPOSED TOWARD THE LIGHT SOURCE AND SAID FILM POSITIONED BETWEEN SAID INNER SIDE AND LIGHT SOURCE, SAID FILM BEING DIMENSIONED AND CONFIGURED TO FIT COLOSELY BUT LOOSELY WITHIN SAID ELEMENT, AND SAID IMPROVED MEANS INCLUDING POSITIONING MEANS EFFECTIVE WHEN THE SAME IS SO MOUNTED ON A LUMINAIRE TO POSITION SAID FILM WITHIN SAID ELEMENT SO THAT A THIN INSULATING AIR SPACE IS PROVIDED BETWEEN SAID FILM AND SAID INNER SIDE OF SAID ELEMENT.