Abstract: A disclosed flat type lamp for a photoionization detector includes: a first plate member having a plate shape and having a first surface on which a plurality of discharge cavities is formed; a second plate member isolating the plurality of discharge cavities from the outside by being disposed and sealed on the first surface of the first plate member; electrodes disposed on the first and second plate members and arranged to face each other; and a discharge gas filled in the plurality of discharge cavities and producing vacuum ultraviolet using electric force that is applied through the electrodes.

Abstract: A refrigeration heating assembly and method of operation are generally provided herein. The heating assembly may include an inner glass tube, a resistive heating element, an outer glass tube, a first end cap, a second end cap, and a sensor assembly. The inner glass tube may include a continuous inner wall defining a central passage. The resistive heating element may be disposed within the central passage. The outer glass tube may include a continuous outer wall disposed about the inner glass tube. A radial gap may be defined between the glass tubes. The first end cap may be positioned on the outer glass tube and the inner glass tube at a first end. The second end cap may be positioned on the outer glass tube and the inner glass tube at a second end. The sensor assembly may be disposed in fluid communication with the radial gap.

Abstract: A high voltage surge arrester including insulating polymer housing with a protruding shed. The shed has an upper shed surface that forms a blunt angle with the longitudinal axis of the surge arrester and a lower shed surface. The lower shed surface includes an inner portion that forms an essentially right angle with said axis and an outer portion that forms an acute angle with said axis. Further the invention relates to an apparatus for molding an electrically insulating polymer housing.

Abstract: A power supply for use in an accelerated weathering test apparatus can ignite the lamp without using a separate igniter and control both the xenon lamp radiated spectrum and its intensity in order to fully simulate the sun's daily cycle, improve the ultraviolet output, reduce the infrared radiation, and compensate for the xenon lamp aging.

Abstract: The invention relates to an electrode assembly for an electrostatic atomizer, in particular for an electrostatic rotary atomizer, comprising at least one outer electrode and an electric resistance device, which has at least one resistance unit that is connected via an electrode connection to the at least one outer electrode and can be connected via a contact connection to a pole of a high-voltage source. The electrode assembly defines a main axis around which an electric field is built up. The resistance unit comprises a resistance track that runs between the electrode connection and the contact connection and is carried by a carrier substrate. The invention also relates to an electrostatic atomizer having such an electrode assembly.

Abstract: An novelly designed gas discharge tube (GDT) comprising at least two electrodes and at least one hollow insulating ring fastened to at least one of the electrodes, wherein the hollow insulating ring has an inductive property or a variable resistance property, thereby the new gas discharge tube can provide another possibility of a circuit design.

Abstract: The invention provides methods and apparatus for extracting ions, and further for producing neutrons from the extracted ions. In an aspect, there is provided a method for extracting ions involving the following step: in a vacuum chamber applying voltages to a spark gap between two electrodes comprising coatings of a hydrocarbon, each voltage sufficient to trigger a spark discharge in the gap sufficient to dissociate the hydrocarbon and extract therefrom hydrogen ions, wherein the hydrocarbon is a nonvolatile liquid sufficiently non-viscous to flow and re-coat holes in the coatings between each spark discharge.

Abstract: A spark plug having a capacitor formed therein and a semi-surface gap, wherein the capacitor permits a high-impulse discharge to occur across the semi-surface gap and the pronounced effects of the Lorentz force, due to the high voltage and high current discharge, cause the spark to project axially away from the end of the spark plug.

Abstract: A starter for electrodeless discharge lamp comprises a printed circuit sheet, at least one printed circuit trace, and at least one electrode. The printed circuit trace and the electrode are provided on the printed circuit sheet and are electrically connected to each other. The printed circuit sheet is arranged on a magnetic core of an electrodeless discharge lamp, such that the printed circuit trace surrounds the magnetic core and the electrode is located close to a discharge gas inside the electrodeless discharge lamp. The starter has simple structure and is easy to mount, and allows a ballast to start the electrodeless discharge lamp at a low voltage.

Abstract: A protection circuit is provided for a T8 LED lighting tube, including at least two power transmission connectors and at least two rectification circuits. The power transmission connectors are respectively mounted to opposite ends of the T8 LED tube and each has at least two contacts that are respectively engageable with tube retention connectors formed on opposite ends of a T8 fluorescent light fixture to receive an external AC power. Each rectification circuit is composed of at least one rectifier semiconductor and the two rectification circuits are respectively connected to the contacts of the two power transmission connectors.

Abstract: The invention relates to a discharge lamp with a floor plate and a roof plate designed for dielectrically impeded discharge, in which the minimum discharge distances are at least 10 mm.

Abstract: The invention relates to a method for the monitoring of a plurality of at least three electrical lighting bodies of the same design, comprising a. Imposition on the plurality of lighting bodies of at least one supply signal from at least one ballast device, b. Reading out of at least one parameter for each of the individual lighting bodies in each case, c. Forming of at least one reference value from at least some of the parameters read out from the different lighting bodies, d. Comparison of the reference value with the parameter of each individual one of the lighting bodies, e. Generation of a signal for each lighting body of which the parameter exceeds a specified deviation from the reference value.

Abstract: A metal halide lamp capable of delaying the rate of deformation in an electrostrictive phenomenon caused by the discharge of a ferroelectric ceramic capacitor when dielectric breakdown is initiated between the electrodes of an arc tube thereby preventing breakage accident, wherein a starting circuit, housed in parallel connection together with an arc tube in an outer tube of a metal halide lamp has in serial connection, a ferroelectric ceramic capacitor that is charged and discharged when a voltage at a predetermined coercive voltage or higher is applied thereby outputting a starting pulse at a high voltage from a ballast, a semiconductor switch that turns to a conduction state when a voltage of a predetermined breakover voltage or higher is applied, and a time constant control resistor that delays the discharge time of electric charges discharged from the capacitor when dielectric breakdown is initiated in the arc tube.

Abstract: A high pressure discharge lamp lighting apparatus includes a high pressure discharge lamp and a power supply apparatus, wherein in a steady state lighting operation, an alternating current of a steady state lighting frequency and alternating current of a low frequency are supplied by turns to the high pressure discharge lamp, and wherein in a small electric power lighting in which electric power to be applied is smaller than that of the steady state lighting, alternating current of a small electric power lighting frequency and direct current are supplied by turns to the high pressure discharge lamp.

Abstract: A cold cathode tube lamp which can be lighted easily when the ambient temperature is low. The cold cathode tube lamp comprises discharge tubes having a pair of electrodes and being driven when a voltage having an AC component is supplied thereto, and ballast capacitors connected with at least one of the pair of electrodes. The ballast capacitor is arranged to come into thermal contact with the discharge tube and to increase the capacitance as the surface temperature of the ballast capacitor decreases.

Abstract: An adapter for a T12 fluorescent light fixture that is used to convert the fixture into a T5 or T8 fixture. The adapter includes a male input for receiving power supplied by the T12 ballast. The adapter has circuitry that adjusts the power supplied by the T12 ballast to parameters usable by a T5 or T8 fluorescent lamp. Also, the adapter includes a female output for outputting the usable power from the circuitry. The usable power drives the T5 or T8 fluorescent lamp.

Abstract: The high-pressure discharge lamp lighting device of the invention includes a lighting circuit for supplying an alternating current to a high-pressure discharge lamp to cause lighting, the high-pressure discharge lamp having an arc tube in which a halogen material is enclosed and a pair of electrodes is disposed, and each electrode having a protuberance at a tip thereof. A frequency of the alternating current varies without dependency on operating data that varies as a lighting time of the high-pressure discharge lamp elapses.

Abstract: A three-way bulb including light emitting diodes is used to achieve a variety of light output colors and/or intensities. In some embodiments, the inputs to a three-way bulb are configured to perform other functions, such as power a motor. In some embodiments, a bulb including light emitting diodes includes a replicable cover. This cover may be configured to project images or support a shade made of a heat sensitive material.

Abstract: Disclosed is a cold cathode lamp composed of discharge tube having a glass tube and an internal electrode, and a ballast capacitor integrally mounted to the discharge tube. The ballast capacitor is composed of a first electrode formed on the outer surface of the discharge tube, a dielectric layer covering the first electrode, and a second electrode formed on the dielectric layer. The internal electrode and the first electrode are electrically connected with each other. At least one of the internal electrode and the first electrode has a portion exposed to the outside. The capacitance of the ballast capacitor can be measured by connecting the exposed portion and the second electrode to a measuring device. Consequently, variations in capacitance of the ballast capacitor, which cause variations in luminance of the cold cathode lamp, can be easily examined.

Abstract: A method and a circuit arrangement for operating a discharge lamp, in particular during the first hours of operation after lamp manufacture, are described. The method and the circuit arrangement are provided in particular for high-pressure gas discharge lamps (HID or high intensity discharge lamps or UHP or ultra high performance lamps). Furthermore, a lighting unit with a discharge lamp and such a circuit arrangement and a projection system with a projection display and such a lighting unit are described. Switching-over between various modes of operation with different operating frequencies serves to avoid that the burning voltage of the lamp drops into a region of a minimum voltage of a lamp driver unit below which the latter can no longer drive the lamp with its rated power or a desired power.

Abstract: A high pressure discharge lamp includes an outer tubular bulb whose inner space is exhausted to a vacuum; an arc tube contained in the outer tubular bulb; and a voltage reducing switching element for reducing a voltage applied to the arc tube. The voltage reducing switching element includes a heat sensitive switching element and a starting-voltage reducing element which are connected in series. During a period in which the heat sensitive switching element has a predetermined temperature or higher, the heat sensitive switching element is closed to electrically connect the arc tube and the voltage reducing switching element in parallel, so that the starting-voltage reducing element is operated. During a period in which the heat sensitive switching element has a temperature lower than the predetermined temperature, the heat sensitive switching element is opened so that the starting-voltage reducing element is not operated.

Abstract: The subject matter of the disclosure is a power supply system for a lamp, having foils, which are embedded in a gas-tight manner in a pinch seal of the lamp and on which are arranged, in each case on two opposing narrow sides, an inner power supply line and an outer power supply line for the purpose of supplying power to a luminous element of the lamp, the outer power supply lines having lamp-side end sections, which are connected to the foils. According to the invention, the end sections of the outer power supply lines extend at least in sections approximately at right angles to a longitudinal axis of the foils.

Abstract: A metal halide lamp includes a ceramic arc tube that is composed of a main body and two narrow tube parts provided at respective ends of the main body; a pair of electrodes provided inside the main body; two feeders, each being connected at one end thereof to a different one of the electrodes inside the main body, and extending through a different one of the narrow tube parts, so as to be external to the arc tube at another end; a starting wire that is connected to one of the feeders, and that is in a vicinity of or contacts an outer surface of the arc tube; and a current suppressing unit that is on a current path of the starting wire, and suppresses or cuts off current on the path.

Abstract: An electronic ballast circuit for a handheld fluorescent task lamp, comprising a self-starting electronic driver circuit operated by a power supply and operable to start and run at least first and second compact fluorescent bulbs from a single output; first and second receptacles for connecting the first and second bulbs to the single output; and a bulb accommodation circuit in the electronic driver circuit that enables operation of the electronic ballast circuit with either starter or non-starter type fluorescent bulbs and with either one or both bulbs.

Abstract: A high-pressure discharge lamp has a discharge vessel that is enclosed, with an interspace, by an outer bulb. The end of the outer bulb is provided with a lamp cap. The lamp has an ignition circuit including a series connection of a glow starter and an ohmic impedance. The ohmic impedance is formed by a halogen incandescent lamp. The mutual orientation of the glow starter and the ohmic impedance is such that heat produced by the ohmic impedance is at least partly intercepted by the glow starter.

Abstract: An ultra-high pressure high pressure discharge lamp device in which the lamp voltage and the distance between the lamp electrodes can be kept stable is achieved by an operating device supplying an alternating current with rectangular waves to the discharge lamp and control is exercised such that a lower boundary value is set and the operating voltage is increased by reducing the operating frequency of the discharge lamp by a given amount, when the operating voltage of the discharge lamp is below the set lower boundary value. Furthermore, control can also be exercised in such a way that an upper boundary value is set and the operating voltage is reduced by increasing the operating frequency of the discharge lamp by a given amount when the operating voltage of the discharge lamp exceeds the set upper boundary value.

Abstract: At least one of a center electrode tip and a ground electrode tip is made of an iridium alloy. A discharge gap, formed between the center electrode tip and the ground electrode tip, is less than 1.1 mm. And, cross sections of the center electrode tip and the ground electrode tip are equal to or smaller than 0.95 mm2 in a spherical region where a distance from a midpoint of the discharge gap is within 0.6 mm.

Abstract: This invention aims to decrease the leakage current of a dielectric barrier discharge lamp, and to prevent generation of the luminance slope between both electrodes. Electrodes 3 and 4 are formed in the outer surface of the dielectric barrier discharge lamp 1, and the high voltage side of the high frequency power sources 5 and 6 is connected to the electrodes 3 and 4, respectively. The low voltage side of the high frequency power sources 5 and 6 is connected to the grounding voltage GND. The output voltage waveform of the high frequency power sources 5 and 6 have different phases each other and inverted polarities each other.

Abstract: A discharge device generates stable direct current glow discharges at high gas pressures. The discharge device has a flat cathode that does not utilize microhollows, and has an anode containing an arbitrarily shaped opening. A dielectric having a minimum thickness separates the anode and the cathode by a by a distance of less than one millimeter. The discharge device may be included in a discharge chamber for maintaining the device at a predetermined pressure.

Abstract: An electric gas lighting device including an ignition circuit for generating sparks at at least one burner and connected to a supply line, supplying a supply voltage, via enabling means for alternatively enabling/disabling spark generation when connected/disconnected to/from a reference potential line; the enabling means are defined by a secondary winding of an isolation transformer interposed between the supply line and the ignition circuit; a first terminal of the secondary winding of the isolation transformer is connected to a first terminal of hand-operated switch means, a second terminal of which is connected to the reference potential line; and the ignition circuit also includes a discharge generating circuit, a first node of which is connected to the reference potential line, and a second node of which is connected to a second terminal of the secondary winding of the isolation transformer.

Abstract: A dielectric barrier discharge lamp with a discharge vessel (1) has at least one inner electrode (5a; 5b) which is covered with a dielectric layer (6a; 6b) and is arranged on the inner side of the discharge vessel (1). The at least one inner electrode (5a; 5b) is electrically conductively connected to a supply conductor (8a; 8b) in a leadthrough region, the leadthrough region being realized by a gastight pinch (9).

Abstract: The invention relates to a gas discharge lamp for dielectrically impeded discharges, which gas discharge lamp is provided with a discharge vessel filled with a gas filling, which discharge vessel comprises at least a wall of a dielectric material and at least a wall having a surface which is at least partly transparent to visible radiation and coated with a phosphor layer, which phosphor layer comprises a phosphor having a host lattice, Eu2+ as the activator and a doping D selected from the group formed by Ce3+, Pr3+ and Tb3+, and provided with an electrode structure for a dielectrically impeded discharge and means for igniting and maintaining the discharge. The invention also relates to a phosphor comprising a host lattice, Eu2+ as the activator and a doping D selected from the group formed by Ce3+, Pr3+ and Tb3+.

Abstract: An ultra-high pressure high pressure discharge lamp device in which the lamp voltage and the distance between the lamp electrodes can be kept stable is achieved by an operating device supplying an alternating current with rectangular waves to the discharge lamp and control is exercised such that a lower boundary value is set and the operating voltage is increased by reducing the operating frequency of the discharge lamp by a given amount, when the operating voltage of the discharge lamp is below the set lower boundary value. Furthermore, control can also be exercised in such a way that an upper boundary value is set and the operating voltage is reduced by increasing the operating frequency of the discharge lamp by a given amount when the operating voltage of the discharge lamp exceeds the set upper boundary value.

Abstract: Alternating current with rectangular waves is supplied from an operating device to an ultra-high pressure discharge lamp in which located within a silica glass discharge vessel is a pair of opposed electrodes separated by a distance of less than or equal to 1.5 mm. A discharge vessel is filled with greater than or equal to 0.15 mg/mm3 mercury and bromine in the range of 10−6 &mgr;mol/mm3 to 10−2 &mgr;mol/mm3. In the operating device, a multiplication device computes the discharge wattage supplied to the discharge lamp and controlled so that in the case of a reduction of the operating voltage of the discharge lamp the discharge wattage is reduced, and that in the case of an increase of the operating voltage of the discharge lamp the discharge wattage is increased.

Abstract: A flash lamp (10), comprising a gas-filled discharge tube (10) made of glass and, at each end, a power electrode (14, 15) that is sealed by means of a glass solder (13), has a glass including one or more of the following U.V. transmission values Tw: at 180 nm: Tw>5%, preferably >9%; at 200 nm: Tw>30%, preferably >45%; at 254 nm: Tw>60%, preferably >80%. The inside diameter of the discharge tube (11) may be larger than 1.2 times the value of the plasma channel diameter. The starting electrode (16) may be part of the reflector (30-33) or be connected electrically thereto. Flash capacitor (42) may be designed for a charging voltage above 370 volts, preferably above 400 volts.

Abstract: The invention relates to a high-pressure discharge lamp comprising a discharge vessel which is enclosed, with clearance, by an outer bulb. The outer bulb is closed at one end by a lamp cap. The lamp is provided with an ignition circuit including at least a series arrangement of a glow starter and an ohmic impedance. According to the invention, the ohmic impedance is formed by a halogen incandescent lamp.

Abstract: The discharge tube (1) of a dielectric barrier discharge lamp is closed off in a gas-tight manner with the aid of a disk-like closure element (7) but without the use of joining elements. For this purpose, the discharge tube (1) has a constriction (10), which surrounds the edge of the disk-like closure element (7) in the form of a ring.

Abstract: Sputtering of the cathodes of a cold cathode fluorescent lamp is reduced or eliminated by removing electrodes altogether from the sealed envelope containing the gaseous medium. Electric field is then applied by means of electrically conductive members outside the tube. Alternatively, the current passing between electrodes can be spread over multiple sub-electrodes so that the current flow and sputtering experienced by each individual sub-electrode will be reduced. Different designs are employed to facilitate heat dissipation for high power and high intensity cold cathode fluorescent lamp applications. Thus, a container for the fluorescent lamp tube may be omitted altogether and adjacent rounds of a spiral-shaped lamp may be attached together by an adhesive material. Alternatively, the container may be open at one end to facilitate heat dissipation. Or the container for the lamp and the housing from the driver may each contain a hole to allow air circulation to carry away heat.

Abstract: An integrated lamp/lamp electronics unit includes a lamp having a first end with first end electrical terminals, and a second end with second end electrical terminals. An end cap having an interior section is placed into electrical connection with the first end electrical terminals at the first end of the lamp. Lamp electronics are configured to control operation of the lamp and are connected only to the second end electrical terminals. The lamp electronics are carried on a circuit board having a configuration substantially matching the second end of the lamp portion. The circuit board is placed within the interior of a lamp electronics end cap, and the end cap is attached in a permanent relationship to the second end of the lamp.

Abstract: A display includes a substrate and an emitter formed on the substrate. A first dielectric layer is formed on the substrate to have a thickness slightly less than a height of the emitter above the planar surface and includes an opening formed about the emitter. The display also includes a conductive extraction grid formed on the first dielectric layer. The extraction grid includes an opening surrounding the emitter. The display further includes a second dielectric layer formed on the extraction grid and a focusing electrode formed on the second dielectric layer. The focusing electrode is electrically coupled to the emitter through an impedance element. The focusing electrode includes an opening formed above the apex. The focusing electrode provides enhanced focusing performance together with reduced circuit complexity, resulting in a superior display.

Abstract: A nonlinear dielectric ceramic having the D-E hysteresis characteristics contains a barium titanate-based compound as a principal constituent and a nonreducing oxide glass as a secondary constituent, and thus the nonlinear dielectric ceramic has reduction resistance. A pulse generating capacitor including the nonlinear dielectric ceramic, a high-pressure vapor discharge lamp circuit including the pulse generating capacitor, and a high-pressure vapor discharge lamp including the pulse generating capacitor are also disclosed.

Abstract: A safety structure to prevent a socket from being over-heated in a lamp string, which comprises a separate lamp string made of a pre-determined number of sockets connected in series. The power-supply wire of the lamp string is connected in series with an additional socket to be plugged with a protective bulb. Two copper wires mounted in the glass tube of the protective bulb are fixed in place by means of a positioning bead. The tail ends of the two copper wires are connected with a fuse having a pre-determined power dissipation. In case of the fuse in the protective bulb being over-loaded, the fuse will be burned out automatically so as to prevent the sockets from being over heated to cause a hazard.

Abstract: A sparkplug having multiple side discharge negative electrodes and employing an integral capacitor extending from the plug body to the area of the connector to the ignition system to effectively store the electrical energy normally lost during the rise time of the ignition transformer, and to discharge the stored energy across the electrode gap. The body (2) has a cylindrical extension which serves as the negative plate (10) of the capacitive element. A positive electrode (8) forms the interior portion of the sparkplug. One end of the positive electrode forms a spark gap (9) with two or more negative electrodes (7). The other end of the positive electrode (8) connects by means of a resistive connector (4) to a conventional high-voltage ignition cable. The positive electrode (8) serves as the positive plate of the capacitive element.

Abstract: To achieve the foregoing objects and in accordance with the purpose of the invention, as embodied and broadly described herein, the metal halide lamp of this invention comprises a vitreous arc tube containing an ionizable medium and having electrodes sealed into opposed ends of the arc tube. An outer envelope encloses the arc tube and includes one end accommodating inleads sealed therethrough. A base is attached to the outer envelope having input terminals, the input terminals being connected to the inleads which in turn are connected to the tungsten electrodes. A mount is provided to support the arc tube within the outer envelope. The ionizable medium will include mercury, a metal halide, and an inert gas selected from the group consisting of argon, krypton, and xenon and mixtures thereof. In addition, a starting circuit having an open circuit voltage of at least 200 volts RMS will be provided. The inert gas having a pressure of at least about 70 torr.

Abstract: A high-voltage discharge lamp has a bulb made of quartz glass, a pair of electrodes and molybdenum foils, wherein the pair of electrodes are arranged so as to oppose each other and are joined to respective ones of the molybdenum foils, and the bulb and molybdenum foils are hermetically sealed at seal portions of the bulb. The joints between the pair of electrodes and the respective molybdenum foils are covered by cylindrical members having slits on an outer surface and/or an inner surface thereof.

Abstract: In a metal halide lamp having a ceramic, tubular discharge vessel (1), there is fitted outside on the discharge vessel an electrically conducting starting aid (11) which provides an inhomogeneous electric field strength. It comprises a metal wire which extends transverse to the axis and from the frame (8) out to the outer wall of the discharge vessel. It ends there approximately at the level of an electrode (2).

Abstract: A non-light emitting protecting device is adapted to be used with a string of lamp sockets that connect electrically a plurality of lamps in series. The protecting device includes a shell, and a conductor circuit encapsulated by the shell. The shell has a size and shape corresponding to the lamps so as to be adapted to be mounted in any one of the lamp sockets. The conductor circuit has two terminals, and a rated circuit connected between the terminals. Each of the terminals has a free end that extends outwardly of the shell and that is adapted to be connected in series with the lamps when the shell is mounted in one of the lamp sockets. The rated circuit is capable of breaking electrical connection between the terminals when current flowing therethrough exceeds a predetermined rated current.

Abstract: A ballast for a compact fluorescent lamp includes a down-converter for operating the lamp with a DC current during stable operation and a charge pump for igniting the lamp. The converter includes an inductor and a first series circuit of a first diodie and a first switching element. An output capacitor shunts the lap terminals. The charge pump includes a second series circuit of second diodie and a second switching element coupled to the lamp terminals with the second diode polarized to prevent the discharge of the output capacitor when the second switching element is conductive. The inductor cooperates with the first and second diodes and the second switching element to build up the voltage across the outpout capacitor to the ignition voltage level of the lamp.

Abstract: A sealed lamp unit for a three-way fluorescent lamp system comprises first and second lamp electrodes located at respective end points of, and extending into, the sealed lamp unit. The sealed lamp unit comprises at least one gas, which breaks-down when an electrical voltage potential is created within the sealed lamp unit. A third lamp electrode is located between the first and second lamp electrodes and extends into the sealed lamp unit. A brightness level of light output from the sealed lamp unit is a function of energizing selected electrodes. A color of the light is independent of the brightness level. A first extended wire connection is electrically connected between the first and second lamp electrodes. A first capacitive impedance, electrically connected in series along the first extended wire connection, limits a current flow through the first extended wire connection. A breakdown voltage path within the sealed lamp unit is modified as a function of a position of the third lamp electrode.

Abstract: A kit for converting a fluorescent lighting unit from inductive operation to electronic operation (using a high frequency ballast). The kit comprises a pair of sleeve-like adaptors which are adapted to be mounted at the ends of a straight fluorescent lighting tube, and a wiring assembly for electrically connecting the adapters. The components forming the electronic ballast can be mounted in one or both of the adapters, or can be mounted in the wiring assembly.