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A halogen light fixture for mounting under a cabinet and over a counter surface, as in a kitchen, has a housing of continuous cross section between opposite end caps adaptable to fixtures of varying lengths, a rapidly accessible wiring compartment by tool free removal of a single partition, and an a

A halogen light fixture for mounting under a cabinet and over a counter surface, as in a kitchen, has a housing of continuous cross section between opposite end caps adaptable to fixtures of varying lengths, a rapidly accessible wiring compartment by tool free removal of a single partition, and an air flow path through the fixture housing including a heat shield arrangement for effective heat dissipation and cooler operation of the fixture.

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What is claimed is: 1. A counter light fixture comprising: a housing having a housing top, a rear wall depending from said top, and opposite end caps, a partition front wall and a partition bottom assembled to said housing top and said rear wall for defining with said housing top a normally closed

What is claimed is: 1. A counter light fixture comprising: a housing having a housing top, a rear wall depending from said top, and opposite end caps, a partition front wall and a partition bottom assembled to said housing top and said rear wall for defining with said housing top a normally closed compartment between said end caps, one or more lamp sockets on said partition front wall, an electrical switch mounted on said partition bottom and electrical wiring in said compartment for interconnecting said one or more lamp sockets and said switch, wherein said partition bottom has a rear edge arranged for contacting said rear wall along a length extending substantially from one to the other of said end caps, said partition front wall having an upper edge retained against said housing top in a closed condition of said compartment, said compartment opening upon release of said upper edge away from said housing top for admitting access to said wiring in said compartment. 2. The counter light fixture of claim 1 wherein said partition front wall is generally parallel to said rear wall and said partition bottom extends between said partition front wall and said rear wall. 3. The counter light fixture of claim 1 wherein said partition bottom and said partition front wall are part of a unitary partition wherein said partition front wall is generally transverse to said partition bottom. 4. The counter light fixture of claim 1 wherein said opposite side walls are molded plastic fittings, and said housing top and rear wall comprise a single element between said opposite side walls. 5. The counter light fixture of claim 1 wherein said side walls are plastic fittings and further including external spacer portions integral with said plastic fittings and raised above an exterior of said housing top such that said housing top is spaced from an overlying mounting surface by said external spacer portions. 6. The counter light fixture of claim 5 wherein aligned openings are provided through said housing top and said plastic fittings for passing fasteners through said openings for fastening the housing to an overlying mounting surface. 7. The counter light fixture of claim 1 or claim 5 or claim 6 wherein said side walls are plastic fittings and said plastic fittings have knockouts removable for opening one or more holes for passing electrical supply wiring into said compartment. 8. The counter light fixture of claim 1 wherein said upper edge of said partition front wall is retained to said housing top by a tab projecting from said partition front wall and into a retaining slot defined in said housing top. 9. The counter light fixture of claim 1 or claim 3 further comprising a translucent diffuser panel supported by said end caps under said one or more lamp sockets. 10. The counter light fixture of claim 9 wherein said translucent diffuser panel is supported in slots defined in said end caps. 11. The counter light fixture of claim 1 wherein said housing top is made of a single sheet bent to define a top and a rear of said wiring compartment, said partition front wall and said partition bottom respectively defining a front and a bottom of said compartment. 12. The counter light fixture of claim 1 wherein said housing front, said housing top and said rear wall comprise a single sheet of metal and said partition front and said partition rear are part of a unitary partition made of a second sheet assembled to said single sheet to define said wiring compartment. 13. The counter light fixture of claim 1 wherein said end caps have integrally formed knockout portions removable for admitting electrical supply wiring into said compartment. 14. A counter light fixture comprising: a first metal sheet having a longitudinal dimension and a transverse dimension, said first metal sheet being bent along said transverse dimension to define a rear wall, a housing top and a housing front; a pair of end fittings for receiving opposite transverse side edges of said first metal sheet; a partition comprising a second metal sheet bent to define a partition front with a top edge and a partition bottom with a rear edge, said second metal sheet being assembled to said first metal sheet to define therewith a substantially closed wiring compartment between said end fittings, said rear edge being supported against said rear wall of said first metal sheet and said top edge being secured to said housing top; and a lamp socket on said partition front and an electrical switch mounted on an outer side of said partition bottom and electrical wiring on an inner side of said partition interconnecting said socket and said switch, such that said wiring is normally contained in said wiring compartment and said compartment can be opened for access to said wiring during installation of said light fixture. 15. The counter light fixture of claim 14 further comprising a translucent panel under said lamp socket supported in front slots defined in said molded plastic end fittings. 16. The counter light fixture of claim 14 further comprising screw holes defined in said end fittings for admitting mounting screws for fastening said end fittings and said first metal sheet to a mounting surface, and wherein said end fittings have raised external spacer portions for spacing said first metal sheet away from the mounting surface thereby to facilitate air flow between the housing and said a mounting surface. 17. The counter light fixture of claim 14 further comprising a fastener for releaseably securing said top edge to said housing top, such that said fastener is accessible upon removal of said translucent panel for disassembly of said partition and access into said wiring compartment. 18. The counter light fixture of claim 17 wherein said fastener comprises a tab projecting from said top edge and a retaining slot in said housing top, such that the partition can be flexed during assembly to align the tab for insertion into said retaining slot whereby the tab is retained in said slot under spring tension by the slightly deformed partition. 19. A counter light fixture comprising: a housing having a housing top, a rear wall depending from said top, and opposite end caps, a partition front wall and a partition bottom assembled to said housing top and said rear wall for defining with said housing top a normally closed compartment between said end caps, one or more lamp sockets on said partition front wall, an electrical switch mounted on said partition bottom and electrical wiring in said compartment for interconnecting said one or more lamp sockets and said switch, wherein said partition front wall is generally parallel to said rear wall, said partition bottom extends between said partition front wall and said rear wall and said partition bottom has a rear edge arranged for contacting said rear wall along a length extending substantially from one to the other of said end caps, said partition front wall having an upper edge retained against said housing top in a closed condition of said compartment, said compartment opening upon release of said upper edge away from said housing top for admitting access to said wiring in said compartment. 20. The counter light fixture of claim 19 wherein said upper edge of said partition front wall is retained to said housing top by a tab projecting from said partition front wall and into a retaining slot defined in said housing top. 21. A counter light fixture comprising: a housing having a housing top, a rear wall depending from said top, and opposite end caps, a partition front wall and a partition bottom assembled to said housing top and said rear wall for defining with said housing top a normally closed compartment between said end caps, one or more lamp sockets on said partition front wall, an electrical switch mounted on said partition bottom and electrical wiring in said compartment for interconnecting said one or more lamp sockets and said switch, said partition front wall having an upper edge retained against said housing top in a closed condition of said compartment, wherein said upper edge of said partition front wall is retained to said housing top by a tab projecting from said partition front wall and into a retaining slot defined in said housing top, said compartment opening upon release of said upper edge away from said housing top for admitting access to said wiring in said compartment. 22. The counter light fixture of claim 21 wherein said partition bottom has a rear edge arranged for contacting said rear wall along a length extending substantially from one to the other of said end caps.