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A lighting fixture having a unitary, combination pan-like, wrap-around housing integrally formed with a refractor lens of high-impact plastics material. The housing is hermetically sealed to a heat-dissipating cast metal plate of the fixture through the medium of a resilient sealing bead interposed

A lighting fixture having a unitary, combination pan-like, wrap-around housing integrally formed with a refractor lens of high-impact plastics material. The housing is hermetically sealed to a heat-dissipating cast metal plate of the fixture through the medium of a resilient sealing bead interposed and mechanically confined between a base flange extending outwardly of bounding side walls of the housing and a face of the base plate at a marginal zone thereof. The housing is stressingly urged againast the sealing bead by means of housing and plate-carried inter-engaging tabs and slots in conjunction with threaded bolts exending through side walls of the housing and matingly engaging threads in bores formed in posts integrally formed with the base plate. The bores are angled so as to effect a positive displacement of the housing toward, to seal with the base plate during threaded advance of the bolts into the threaded bores of the base plate. The fixture houses twin parabolic reflectors and the housing also encloses and protects the reflectors as well as all of the electrical components of the fixture, including ballasts. The latter are mounted on solid metallic pedestals integrally formed with the cast base plate, and constituting heat sinks for dispelling heat generated in the ballasts during energization of the fixture.

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A sealed, water-impermeable, lighting fixture for horizontal and for vertical mounting and including a unitary refractor lens and housing of high impact strength plastics material surmounting and fastened to a base plate of cast metal, said housing comprising a pan-like shell having four perimetric

A sealed, water-impermeable, lighting fixture for horizontal and for vertical mounting and including a unitary refractor lens and housing of high impact strength plastics material surmounting and fastened to a base plate of cast metal, said housing comprising a pan-like shell having four perimetric side walls joined to one another at lateral limits thereof to form an endless circumambient wall and subtending and integrally formed with a transversely disposed, generally planar, light-permeable, lens-like panel, junctures of adjacent walls of intersecting said side walls of said shell being blended along radial arcs to form arcuately curved corner structures, and junctures of said side walls with said panel being arcuately blended to provide curved edge portions of said shell, said base plate being of a unitary, die-cast aluminum construction and constituting both heat sink means for dissipating heat generated within said fixture, and floor means for supporting internal mechanical and electrical components of said fixture, contained within said housing, said panel of said shell defining a luminous, window-like lens for transmittal of fixture-derived illuminating light therethrough, said lens being integrally molded as a unitary refractory structure with said side walls of said shell, a pair of preformed, co-extending, parallel, inwardly-concave, outwardly-opening, trough-like reflectors for directing and focusing light emanating from energizable lamps of said fixture, base-plate-supported lamp socket means at an end of each of said trough-like reflectors for supporting elongate lamps to extend generally codirectionally with longitudinal axes of said troughs, said housing and said base plate being formed with cooperating wall means and trench means disposed in overlying and congruently super-imposed spatial orientation for receiving compressibly confined, resiliently-stressed gasket-like sealing means therebetween and seated in said trench means for establishing a fluid-tight seal between said housing and said base plate to prevent entry of moisture into said housing of said fixture, said trench means traversing said base plate about a circumambient marginal zone thereof, resiliently-compressible, endless, bead-like gasket means seated in said trench means throughout a circuitous course thereof and having an uninterrupted exposed surface displaced outwardly of a radial limit of said trench and constituting a sealing face of said gasket means, and fastening means for securing said housing to said base plate for establishing said lighting fixture as a unitary, composite structure.