An optical unit for an aircraft warning light comprising an array of LEDs, the unit comprising a transparent plastics molded body having first and second opposing faces and being provided with optical means on its first and optionally also its second face to propagate fractions of light emitted from the LEDs in selected directions in accordance with a predetermined angular distribution. The optical means may, for example, take the form of discrete convex lenses, cylindrical aspherical lenses, pr...

There is provided a lighting apparatus particularly adapted for use as a stand type lamp which comprises a light assembly composed of an electric bulb and a shade; and a stand essentially constituted by a rubber-made elongated stem member of a generally rectangular or oblong cross-section carrying said light assembly on the upper end thereof. Said stem member is characterized by that it is formed with a plurality of annular grooves of generally U-shaped cross-sections over the whole periphery th...

An electrical lighting fixture is provided. The fixture comprises a housing containing conventional electrical components therein. The housing has front and rear surfaces and walls extending between the surfaces. At least one cable opening extends through the wall and a plate is positioned within the housing abutting the wall. The plate includes a main body portion and a plug extending outwardly from the body portion. The plug is dimensioned to fit in and fill the opening. Clip means within the ...

Fluorescent tubes are cooled by contacting the upper part of the cylindrical surface of such tubes with a contact member heat conductively associated with a cooling device. This device preferably consists of tubular contact members having a part-cylindrical concave surface for contacting the fluorescent tubes and inserted in a circuit for circulating cooling water through the tubular contact members. These contact members are mounted in a channel-shaped housing, heat conductivity associated ther...

A lighting device that enables use of one or more light-emitting diodes (LEDs) in combination with a reflector is described. The subject lighting device includes at least one LED on a supporting portion, such that the LED is located in front of and aimed toward a reflector. Light emitted from the LED is reflected by the reflector and travels past the LED to provide light. The light-emitting diode(s) may be substantially centrally located with respect to a central axis of a reflector. Focusabilit...

First resistors (R1, R2) for setting a forward current value are connected in series to light-emitting diodes (LED 1, LED 2) respectively to constitute first serial circuits (112, 113), which are connected to an input terminal (111). Second serial circuits (115, 116) are connected in parallel to the first serial circuits (112, 113) respectively. The second serial circuits (115, 116) are constituted by a combination of a Zener diode (ZD1) and a second resistor (R3), and another combination of a Z...

A lighting fixture is removably supported within a coffer of a modular suspended ceiling structure by two arms which are retractably mounted at each end of the fixture for movement between extended positions in which they are supported on the top surface of the surrounding ceiling structure and retracted positions to permit vertical lowering or upward insertion of the fixture into the ceiling.

A lighting fixture adapted to be mounted on a ceiling by attachment to an outlet box in the ceiling. The fixture comprises a pan having an upwardly extending rim and a crossbar attached to the bottom of the outlet box in a position extending horizontally across the bottom of the box. The rim of the pan is adapted to be attached to at least one end of the crossbar for mounting the pan adjacent the ceiling.

Circuits are disclosed for use in a gaseous-discharge lamp lighting system which provide starting pulses to the lamp and/or a source of auxiliary light. One circuit provides starting pulses and/or auxiliary light until the gaseous-discharge lamp approaches its normal operating condition, while other circuits terminate these functions once the gaseous-discharge lamp ignites.

Lighting equipment includes three distinct spaced, parallel mounting structures held together by sheet metal in a preferably box-shaped configuration. Two outer ones of these mounting structures each include a profile having a wall thickness greater than the thickness of the sheet metal and an interior configuration corresponding to an exterior configuration of each of two arms of a lamp to be mounted relative to a pole. The central one of the mentioned elongate mounting structures has a profile...