Abstract: A light tube for replacing fluorescent tubes including a bulb portion and a pair of end caps disposed at opposite ends of the bulb portion, and configured for illumination by a power supply circuit. A plurality of light emitting diodes are disposed inside the bulb portion and in electrical communication with a pair of end caps for illuminating in response to electrical current to be received from the power supply circuit.

Abstract: The luminaire of the present invention comprises at least two channel reflectors geometrically arranged in substantially a common plane forming a light emitting region, each channel reflector has one fluorescent lamp holder extending therein and each channel reflector has a channel reflector retaining arm having a ballast therein and extending to a luminaire supporting base.

Abstract: A lighting fixture where the lighting fixture uses inductive lighting technology or self ballasting lighting elements with one or a plethora of efficient light elements. The lighting fixture is used where high bay or low bay lighting may be used, but incorporates multiple light sources to provide an equivalent light intensity. The invention may include a hanging system that allows the entire assembly to be wired into a new or existing building and supply self ballasting lights, or ballast box and the dome or reflector. This fixture uses one or more high efficiency inductive lighting in similar 2 ft by 2 foot or 2 foot by 4 foot housing. A ballast box is secured to the reflector or dome retainer making the fixture a direct replacement for similar size and shape inductive fixtures.

Abstract: A backlight structure comprises a frame, a circuit board, and a connector. The frame has an opening. The circuit board is located below the frame and has a through hole, wherein the through hole aligns with the opening. The connector passes through the opening and the through hole, protrudes from a surface of the frame, and is electrically connected to the circuit board.

Abstract: A detachable ballast housing for use with fluorescent lights includes a ballast, a housing for the ballast, and electrical contacts for detachably mounting and dismounting to a lighting fixture without connecting or disconnecting power wires.

Abstract: A backlight in which a reflector is secured to a chassis disposing a mounted substrate mounting light emitting diodes between the reflector and the chassis by a lamp clip for holding lamps and the mounted substrate is connected to a drive substrate outside the chassis and also relates to a liquid crystal display device provided with the backlight and a liquid crystal panel. The backlight and the liquid crystal display device capable to detect colors accurately by blocking light transmitted other than through a transparent part of a lamp clip and prevent light from escaping through fitting holes for the lamp clip into a space outside a chassis are provided. A cover surrounding a photodiode and through holes to transmit light from the clip to an LED drive substrate is disposed between the chassis and the LED drive substrate.

Abstract: A backlight module including a plurality of lamps, a first circuit board, and a second circuit board is provided. Each lamp has a first electrode and a second electrode. The first circuit board has a plurality of first openings and first conductive clips. The first electrode is disposed to extend through the first opening and to be clamped by the first conductive clip. Furthermore, a plurality of current adjustment devices is disposed on the first circuit board. The current adjustment device is electrically coupled to the first electrode through the first conductive clips. In the backlight module, the conductive clips or clamping pins of the current adjustment devices are used to hold the electrodes of lamps, thereby facilitating the assembly process of backlight module.

Abstract: Provided is a backlight assembly which includes integral power supply sockets and ground sockets, in which the number of parts is reduced in addition to the manufacturing cost. The backlight assembly includes a lamp including a lamp tube and an electrode that protrudes beyond either end of the lamp tube, a power supply socket including a first plate that has a first guide groove through which the electrode is inserted and a plate spring that is disposed on one side of the first plate and fixes the electrode in the first guide groove by pressurizing the electrode, and a bottom chassis containing the lamp and the power supply socket therein, in which the first plate and the plate spring are formed of a conductive material.

Abstract: A power supply module for a lighting system is directly mountable onto a special cover plate for a standard electrical junction box. The power supply module is provided with a plug assembly that mates with a socket assembly incorporated within the special cover plate. The power supply circuit provides an electronically power limited output through multi-conductor connectors. The power supply output is used to connect to luminaires using a multi-conductor cable having multi-conductor connectors that mate with the multi-conductor connectors on the power supply and the luminaires. The luminaires use a circuit to interface between the power supply output and the lamp. The special cover plate is also suitable for receiving a plug assembly incorporated within the base of a lighting base module that can provide temporary incandescent or gas-discharge lighting.

Abstract: A base for the installation of a plurality of energy-efficient light bulbs includes: a plurality of light bulb connectors, each of which has at least two conductive terminals; a connecting part, which is connected among the light bulb connectors, wherein a wire is provided to electrically connect the conductive terminals of the corresponding electrodes of the light bulb connectors; and at least two quick connection devices provided inside the connecting part for the connection of external lines, each of which is electrically connected with the wire of the corresponding electrode in the connecting part. Therefore, the external lines can electrically connect to the light bulb connectors via the quick connection devices.

Abstract: A backlight device includes a frame, at least one lamp unit each comprising a transformer and a discharge lamp structured into an integral and rigid unit, and also includes a circuit board for lighting the discharge lamp, which is disposed at the back surface of the frame and at which the transformer is mounted at. The transformer of the lamp unit includes: two terminal blocks having terminal pins; a bobbin having a primary winding and first and second secondary windings wound around an outer circumference of the winding core member; a magnetic core; and two lamp connecting terminals attached respectively to the terminal blocks and connected respectively to the first and second secondary windings, wherein the discharge lamp is attached to the transformer with electrodes of the discharge lamp connected directly to the lamp connecting terminals of the transformer, thus forming the lamp unit into a integral structure.

Abstract: A low cost under-cabinet and display case lighting system that permits the highest degree of flexibility in the installation and location of luminaires for under-cabinet and display case lighting. The system consists of a high-frequency power source, an interconnection cord, and one or more high-frequency luminaires. The high-frequency power source is powered from a source of 50 or 60 Hertz power. The interconnection cord is connected to the high-frequency output of high-frequency power source. The high-frequency luminaires are mounted in the desired locations under the cabinets or display case shelves. Any number of high-frequency luminaires (within the capacity of the high-frequency power source) may be added.

Abstract: A power converter is added to a fluorescent light to inexpensively convert fluorescent lighting to LED lighting utilizing existing ballast technology. This will encourage and facilitate conversion to more efficient lighting and the result will be energy savings. The conversion is relatively inexpensive and easy to do vs. fixture replacement. Two factors, which will encourage conversion to more efficient lighting are cost of conversion and time of conversion. The power converter will make it economically viable to convert to LED lighting.

Abstract: A backlight unit includes at least one cold cathode fluorescent lamp arranged at a lower end of a bottom cover, external electrode fluorescent lamps arranged on the bottom cover above the cold cathode fluorescent lamp, and inverters disposed on a rear side of the bottom cover for driving the at least one cold cathode fluorescent lamp and the external electrode fluorescent lamps.

Abstract: A battery operated fluorescent lamp is disclosed, which is operable from the battery while the battery is being recharged, comprising a tubular housing configured as a handle grip at one end and a cylindrical lens portion at the other end. The tubular housing lockably connects to a battery pack. The cylindrical 3030 lens portion encloses a miniature fluorescent bulb. The electrical circuitry, enclosed within the handle grip and alternately operable from either 120 VAC or 12 VDC, includes a converter circuit, a battery charging circuit, and a fluorescent lamp ballast circuit. The battery pack is electrically coupled to simultaneously receive charging current from an output of the charging circuit and to deliver DC supply voltage to the fluorescent lamp ballast circuit without the occurrence of a net discharge of the battery pack.

Abstract: Devices for providing light and methods and devices for fabricating them are described. Lighting devices having lighting elements (e.g., based on LEDs, OLEDs, or other lighting technology) coupled to a frame allow for efficient dissipation of heat generated by the lighting elements. Each lighting device can be configured to be easily expandable, replaceable, and adaptable to different lighting device systems. A modular lighting device is also described. According to various embodiments, modular stacked frames and/or modular lighting element subassemblies are used. A manufacturing assembly is also described for fabricating the lighting devices. The use of reclaimed materials in the present invention is also described, which may further add value to the apparatus and methods of the present invention.

Abstract: An air cleaning unit is provided. The air cleaning unit includes a housing having an air intake and an air outlet. Intermediate the air intake and air outlet is an air filtration medium. Also within the housing is at least one UV-C lamp. The air cleaning unit also includes an odor-reducing medium, such as a photocatalytic oxidation (“PCO”). filter. A method for filtering air using the air cleaning unit is also provided.

Abstract: A reduced emissions work light that includes a bulb having an elongated bulb tube, a handle adjacent the bulb and adapted for being gripped by a user to manipulate the work light, an emissions containment housing positioned adjacent the bulb tube, and an integrated ballast and filter assembly. The integrated ballast and filter assembly is located within the housing and operatively connected to the bulb for providing voltage to the bulb and reducing emissions generated by the work light.

Abstract: An LED light bulb having separately addressable groupings of LED's. The LED light bulb can serve as a visual indicator of emergency or non-emergency conditions by selectively illuminating groupings of LED's in a variety of colors, each color corresponding to a predetermined condition.

Abstract: Disclosed herein is a lighting device using a cold cathode fluorescent lamp (CCFL), which has reduced size and volume and concentrates light from the CCFL, thus enhancing its luminance. The lighting device includes a casing which is open on a surface thereof, thus having an open part, with an ON/OFF switch button which protrudes through a sidewall of the casing and is used to turn on or off the lighting device. A reflective plate is inserted into the casing through the open part, with a circuit board provided on a predetermined position of the reflective plate. A CCFL is inserted into the reflective plate and electrically connected to the circuit board with a cover assembled with the casing and receiving the CCFL between the casing and the cover. A socket is assembled with each end of the casing that supports both the CCFL and the cover, and is electrically connected to the circuit board.

Abstract: 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. Screw fasteners pass through aligned openings in the housing and the end caps for attachment to the cabinet underside, and spacers integral to the end caps provide for air flow between the fixture and the cabinet. A partition also extending between the end caps provides a closed wiring compartment and some or all of the electrical components of the fixture, including lamp sockets and power switch can be mounted on the partition for ease of assembly and access.

Abstract: A backlight assembly having protrusions in a side surface between a side supporter and a cover shield is provided. The protrusions prevent the cover shield from being deformed by an external force and prevent disconnection of a wire between the side supporter and the cover shield. The backlight assembly includes a plurality of light sources; a side supporter having a plurality of U-shaped curved portions which align with and support the light sources; a PCB having a plurality of inverters mounted thereon; a plurality of wires which connect the inverter and an electrode of each light source; a cover shield with an edge for protecting end portions of the light sources and a second edge for protecting the PCB; and an extension formed on one surface of the side supporter opposite to the cover shield edge.

Abstract: An illuminator for a display device is provided on a back side of a display panel, and includes a plurality of rod-shaped light sources each having a length extending in a first direction and having substantially the same length. The plurality of rod-shaped light sources include a plurality of first rod-shaped light sources arranged so as to be substantially parallel and spaced from one another in a second direction that is generally perpendicular to the first direction, and a plurality of second rod-shaped light sources arranged to be substantially parallel and spaced from one another in the second direction, each second rod-shaped light source being arranged to be collinear with and spaced in the first direction from a corresponding one of the plurality of first rod-shaped light sources.

Abstract: A backlight unit is disclosed, to remove an unnecessary portion from a PCB and to decrease the number of connectors and wires, which includes a plurality of light-emitting lamps arranged in one direction inside a lamp housing; first and second driving unit PCBs positioned at both sides on the rear surface of the lamp housing, to apply a power to the light-emitting lamps; first and second connection PCBs positioned at both sides of the lamp housing, wherein the respective first and second connection PCBs are separately provided from the first and second driving unit PCBs; and first and second power supplying wires for the respective connection between the first and second driving unit PCBs with the first and second connection unit PCBs.

Abstract: An illumination assembly for a handheld fluorescent task lamp, comprising first and second elongated compact fluorescent bulbs positioned in an upright orientation side by side; a self starting electronic driver circuit operable to start and run the at least first and second compact fluorescent bulbs; and first and second receptacles for connecting the first and second compact fluorescent bulbs to the driver circuit and orienting the first and second compact fluorescent bulbs at a predetermined optimum angle with respect to each other such that an enhanced forward emission field is provided.

Abstract: A lighting assembly with a lamp housing and a component housing which have corresponding mechanical connectors for releasably attaching the housings to one another and which have corresponding electrical connectors for releasably providing electrical connection between the housings. The lamp housing has a lamp frame, at least one lamp socket for receiving at least one lamp and lamp wiring for supplying power to the at least one lamp. The lamp housing has an electrical connector operably attached to the lamp wiring. The lamp housing further has a mechanical connector. Mounted to the component housing are electrical control components, electrical ballast and a power supply socket. The component housing has an electrical connector operable to releasably connect with the electrical connector of the lamp housing. The component housing has a mechanical connector operable to releasably attach to the mechanical connector of the lamp housing.

Abstract: A light fixture or troffer for directing light emitted from a light source toward an area to be illuminated, including a reflector assembly within which the light source is positioned; a housing defining at least one selectively enclosable ballast enclosure; and a ballast that is positionable in the at least one ballast enclosure.

Abstract: A retrofit unit for a fluorescent lighting fixture having a chamber with a ballast and a plurality of downwardly extending lamp holders for enclosing an existing fluorescent strip light fixture, wherein neither the ballast nor the lamp holders of the existing fluorescent lighting fixture need be removed to receive this retrofit unit.

Abstract: A modular lighting system is formed of tubular fluorescent lamps mounted within adjustable fixtures. The fixtures are composed of rigid and flexible elements and can conform to the shape of almost any size or shape of lamp. The lamps may be of any variety of pre-determined shape, curvature or length, to meet the desired lighting requirement. Each fixture may include a lampholder, lamp retention device, mounting surface, ballast, enclosures, and specially-molded flexible special power cable which flexibly connects the rigid elements or assemblies of each fixture. Electrical connections are made between each adjacent fixture with integral male and female flexible power cords. Thus, a custom-made fluorescent lighting system is created using standardized flexibly adjustable fixtures and any variety of lamp shapes or lengths. The system may be installed and electrically connected without any disassembly or tradition field-assembled and installed wiring, minimizing effort for installation or removal.

Abstract: Modular ballasts of an aquarium comprise a lampshade and a plurality of ballast modules, wherein a reflection plate and a plurality of lamps are mounted inside the lampshade. At least a socket locates on the backside or the top of the lampshade for holding the ballast modules that comprise housings and ballasts. The ballasts are fixed to the housings and the ballast modules are capable of coupling with the lampshade. Because the ballasts are coupled with the housings, the manufacturers are capable of assembling the ballasts efficiently and the consumers are capable of changing the ballasts simply by pulling out the ballast modules by themselves. Consequently, the consumers can install the ballasts by themselves so as to save the required time for the change adequately.

Abstract: A reflector for flat panel display device. The device is constructed having two sidewalls and a base wall defining with the sidewalls a receiving chamber having a substantially U-shaped cross section for holding a light source. The sidewalls and the base wall each have a reflecting surface adapted to reflect light from the light source installed in the reflector. The sidewalls each have a protruded flange (block) respectively disposed at an outer side for grounding with a grounding metal frame. The protruded flange (block) of each sidewall is not disposed with the respective sidewall on the same plane.

Abstract: A luminaire has a ballasting circuit assembly for a gas discharge lamp, with an input power connector assembly suitable for receiving and connecting with a mating multi-conductor connector assembly. A ballasting circuit in the ballasting circuit assembly is suitable for powering a gas discharge lamp. Output leads suitable for connecting to a gas-discharge lamp socket with the wiring therefore are contained within the luminaire.

Abstract: A decorative lighting assembly includes a plurality of light emitters each having a pair of oppositely positioned first male connectors. The light emitters emit light when power flows through the first male connectors of the light emitters. A plurality of elongated couplers is provided and each has a pair of first female connectors electrically coupled together and positioned opposite of each other. Each of the first female connectors is configured to receive and electrically connect to one of the first male connectors. The light emitters are each positioned between and electrically coupled to a pair of elongated couplers to form a strand of electrically coupled light emitters. The strand is electrically coupled to a power supply coupler configured for electrically engaging a female power outlet.

Abstract: Described is a lamp which includes two fluorescent tubes arranged in parallel relationship and light distribution chambers which extend laterally therefrom on both sides, and a light-technical louver element arranged beneath the fluorescent tubes, for delimiting the light radiating angle of the fluorescent tubes downwardly, wherein arranged between the fluorescent tubes is an elongate trough which is in the form of a mirror on its outside, for accommodating the electronic operating elements for the fluorescent tubes (FIG. 1).

Abstract: A compact and cost-efficient lamp assembly includes cold-cathode fluorescent lamps in a variety of edge-lit display sign applications specifically, in edge-lit emergency lighting signs. The lamp assembly includes in one self-contained module a lower housing unit and an upper housing unit shaped to cover the lower housing unit. The lower housing unit is divided into a lower frame and an upper frame disposed on top of the lower frame. The upper frame has at least two inverters disposed within. The lower frame is a parabolic shape reflector frame supporting at least two cathode lamps in line with the two inverters, each of which is connected to each lamp for providing high voltage to power up the lamps. Additionally, an edge-lit panel having a front and back side is disclosed in the present invention. The backside includes a semi-transparent frosted surface with a white opaque lamination glued on the frosted surface.

Abstract: A multi-function lighting module providing two or more possible light source capabilities, such as ambient and/or focused and or emergency lighting where power is supplied by an existing bus system, and the module is connected to the existing bus system by a tool-less means of connection.

Abstract: Disclose is a master-satellite assembly for retrofitting a first existing recessed strip light fixture and a second existing recessed strip light fixture in a grid ceiling, where the existing fixtures are arranged end to end and are separated by a T-bar support member. The assembly has a master retrofit fixture, a satellite retrofit fixture and a wire cover bracket. The master retrofit fixture is received within the first existing recessed strip fixture and the satellite retrofit fixture is received within the second existing recessed strip fixture with wiring running under the T-bar support. The wire cover bracket extends from the master retrofit fixture, under the T-bar support member, and to the satellite retrofit fixture in order to cover the wiring. Also disclosed is a method of retrofitting utilizing the master-satellite assembly, and a retrofit reflector configuration utilizing hanger tabs extending from the ends of the retrofit reflector.

Abstract: A linearly extensible modular luminaire comprised of mounting tracks (100,180) and translationally offset overlapping channels (211,212), with incorporated luminous means, alone or along with hangers (331,332,731) that provide support for cover brackets (431,731) that are attached to light modifying coverings (400,900), and wherein linearly radiated light is distributed directly, or in combination with coverings indirectly or modified, when connected with a source of power and energized. Also, the modular luminaire that is not extensible but otherwise comprised of same components not translationally offset, permitting the construction of a wide variety of luminaires, such as the one in FIG. 11, that incorporates a canopy (150) for mounting over lighting outlet boxes.

Abstract: Methods and systems are provided for lighting systems, including high output linear lighting systems for various environments. The linear lighting systems may include power systems for driving light sources in high-voltage environments.

Abstract: A string set of series-connected incandescent flasher type lamps in which substantially all of the lamp filaments in the set are individually provided with a voltage regulated shunt circuit, which includes a voltage responsive silicon semiconductor device, which operates in one of two conducting states, neither of which is greater than about 200 ohms. When the flasher lamp is in the “on” or illuminated state, the silicon semiconductor voltage regulating shunt device is in a low impedance state. When the flasher is in the “off” state, the impedance of the silicon semiconductor device is in a lower impedance state equal to or slightly greater than the parallel equivalent impedance of silicon semiconductor device in parallel with the normal operating impedance of the flasher lamp.

Abstract: The present invention provides a side-entry lamping fixture and cartridge, comprising a fixture having an upper fixture wall and a lower fixture wall, first and second sidewalls joining said upper and lower fixture walls and, at least one of the first and second sidewalls having a re-lamping aperture. The apparatus further comprises a lamping cartridge having a cover including a socket attached to the cover, a lamp in electrical communication with the socket and a fastening portion extending from the cover. The fixture and cartridge provide for a removable lamp which may be replaced without interfering with the fixture walls or a reflector therein, yet remain properly oriented when installed.

Abstract: A backlight module for a liquid crystal display device is disclosed. The backlight module includes a bottom housing having at least one side frame that has a terminal installation part; a lamp bracket having a pair of opposing lamp supporters and a pair of opposing side shafts, wherein the lamp bracket is mounted on at least one side frame and can be moved relatively to at least one side frame; at least one first terminal mounted on the lamp supporters for conducting electrical signals; at least one lamp having a pair of electrodes engaging with at least one first terminal, wherein the electrode is at an end of the lamp; and at least one second terminal mounted on the terminal installation part, wherein at least one second terminal connects with an external driving device and has at least one electrical connecting surface for electrical connecting with the first terminal.

Abstract: A retrofit unit for a fluorescent lighting fixture having a chamber with a ballast and a plurality of downwardly extending lamp holders for enclosing an existing fluorescent strip light fixture, wherein neither the ballast nor the lamp holders of the existing fluorescent lighting fixture need be removed to receive this retrofit unit.

Abstract: A clear, hollow cylindrical tube having an internal circuit board with LED lights provides a lighting and flashing illumination device. The LED lights may either all be illuminated at once, or have certain LEDs with constant illumination while other LEDs may be placed into a flashing mode. The power source for the lighting and flashing apparatus includes either standard or rechargeable batteries and a 12-volt external source. The 12-volt external source may also be used to recharge the rechargeable batteries. The cylinder has an upper collar with both magnetic and hook hanging mechanisms. The rechargeable LED lighting and flashing apparatus provides much more illumination than a flashlight using standard charging and lighting electrical parts.

Abstract: System of reflectors and base of parabolic fluorescent luminary for concentrating and guiding light, with improved light output and reduction in construction cost. On the support base of the electrical components of the luminary, two of the four side walls are made of plastic, which are assembled by easy and quick snapping to the main body of iron sheet. These plastic side walls have specific cavities and projections for mounting a grid of parabolic reflectors, which consists of the following, two separate parts made of thin plastic film of at least one reflecting surface: (i) the main parabolic components for directing the light, which are placed under fluorescent lamps, and (ii) the upper cross-made grid, which can be removed from the luminary independently of the main parabolic components. Thus, the main parabolic components do not need to have openings along the lamps. As a result, their continuous parabolic shape improves significantly the light output of the parabolic luminary.

Abstract: The present invention is a kit for adapting a tube lamp fixture made for a first size of lamp tubes into a fixture that accommodates smaller lamp tubes. The kit comprises a conversion apparatus that itself comprises a bar in which are disposed one or more plugs for connecting to the sockets in the existing tube lamp fixture, said plugs being slidably disposed on the bar to adapt to the position of the sockets in the fixture. The conversion apparatus further comprises one or more slidably disposed sockets on the opposite side of the bar that may be positioned independently from the plugs. Appropriate wiring permits the supply of electrical energy to the tube lamps. The invention further comprises a master-slave ballast conversion assembly. The ballast conversion assembly comprises a chain of circuit boards connected by cables and connectors that enable a single ballast to control two or more tubes through a chain of circuit boards.

Abstract: A lighting device according to an embodiment of the present invention includes a pair of sockets 22 made of a soft and elastic conductor and arranged facing each other, with which electric power is supplied to EEFL lamps 21. A plurality of lamp inserting holes 220 is provided along the longitudinal direction of the socket 22. External electrodes 214 at the both ends of EEFL lamps 21 are pressed into each of the lamp inserting holes. These sockets 22 are supported and coated by socket holders 23 made of an insulator having higher rigidity than the sockets 22 respectively.

Abstract: Retrofit fluorescent light tube fixture apparatus of this invention includes a metal reflector of an inverted wave shape and fluorescent light tubes, attached to sockets, mounted in the troughs of the inverted wave shape, and a formed plastic having the same contour as the inverted wave shape, and the formed plastic fitting intimately on the back of the reflectors to be a sub-assembly, and this subassembly fitting onto a ceiling mount channel wherein side walls of the ceiling mount channel fitting into slots in sidewalls of the formed plastic backing, and the side walls of the formed plastic backing attached to live plastic hinges also attached to the formed plastic backing. Preferred material for the formed plastic backing is a rigid polyvinylchloride (PVC), and flexible PVC for the live plastic hinge. The live plastic hinge allows drop down of either side of the fixture apparatus without de-mounting from the ceiling mount channel.

Abstract: A reduced emissions work light includes a bulb with an elongated bulb tube. A handle is provided adjacent the bulb, and is adapted for being gripped by a user to manipulate the work light. An emissions containment housing is located within the handle. A ballast is located within the housing, and is operatively connected to the bulb. An emissions filter is located within the housing, and is operatively connected to the ballast. The filter and housing cooperate to reduce emissions generated by the work light.

Abstract: An improved efficiency fluorescent lighting system is described. The system utilizes reduced rows of fluorescent luminaires which are spaced much further apart than traditional spacing. The luminaires used in the system of the present invention have increased light output of each luminaire by up to fifty percent through a combination of use of a high efficiency lamp producing about 3250 lumens, an electronic dimming ballast having a ballast factor of about 1.2 and a luminaire having a spacing to mounting height ratio of at least 1.5.