Abstract: A system and method for providing an alternate AC voltage to an electrical load having a main AC voltage. The system and method include a signal generator for generating a main AC voltage signal representing the value of the main AC voltage, and a processor for processing the main AC voltage signal to determine a status of the main AC voltage, a main AC voltage failure time period, and a main AC voltage restoration time period. The system and method also include a control signal generator for generating a control signal in response to the main AC voltage signal, the main AC voltage failure time period, the main AC voltage restoration time period, and a pre-selected delay time period, and a switch for switching the electrical load between the main AC voltage and the alternate AC voltage in response to the control signal.

Abstract: A method and system for designing a lighting installation. The system includes a processor for executing the method, which includes generating lighting area input data signals based on selected parameters associated with a lighting area, and generating luminaire input data signals based on selected parameters associated with a luminaire. The method also includes processing the lighting area input data signals to obtain a lighting area factor, and processing the luminaire input data signals to obtain a photometry factor. The method also includes processing the lighting area factor and the photometry factor to determine a light level value in the lighting area, and generating a light level output signal based on the light level value determined. The system and method further include a system and method for manipulating data three-dimensionally in a spatial view on a video monitor.

Abstract: A method and system for designing a lighting installation. The system includes a processor for executing the method, which includes generating lighting area input data signals based on selected parameters associated with a lighting area, and generating luminaire input data signals based on selected parameters associated with a luminaire. The method also includes processing the lighting area input data signals to obtain a lighting area factor, and processing the luminaire input data signals to obtain a photometry factor. The method also includes processing the lighting area factor and the photometry factor to determine a light level value in the lighting area, and generating a light level output signal based on the light level value determined. The system and method further include a system and method for manipulating data three-dimensionally in a spatial view on a video monitor.

Abstract: A retrofit unit for a fluorescent lighting fixture having a housing with an open face and a method for installing same. The retrofit unit includes a reflector plate for covering the open face of the housing and brackets for attaching the reflector plate to the housing. The reflector plate has slots formed therein which cooperate with the brackets for adjusting the reflector plate to fit the housing. At least one of the brackets acts as a hinge allowing the reflector plate to rotate away from the open face of the housing. The method includes providing the reflector plate and brackets, as well as inserting a bracket in a slot, adjusting the brackets relative to the slots, and adjusting fasteners relative to the brackets.

Abstract: A method and system of converting a wide range of DC input voltages from a DC power source to a substantially lower regulated DC output voltage is disclosed. A pulse width modulated (PWM) signal is generated from an applied DC input voltage to obtain a desired regulated DC output voltage. The PWM signal has a fixed frequency and a variable duty cycle. The PWM signal is filtered to provide a DC output voltage proportional to the amount of time the PWM signal spent in the ON or HIGH state. The duty cycle of the PWM signal is controlled based on an error signal generated by comparing an error voltage level that is proportional to the output voltage to a voltage reference. High voltage protection is provided to the controller during the period the PWM signal is in the OFF or LOW state.

Abstract: An internally illuminated sign in which a luminaire mounted on the border or periphery of the sign uniformly illuminates the face and/or faces of the sign thereby eliminating any necessity for providing human access to the interior of the sign for maintenance and relamping.

Abstract: A modular luminaire assembly including a top mounting assembly, an optical assembly removably affixable to the top mounting assembly and an electrical assembly removable affixable to the optical assembly where the optical assembly is mechanically coupled to the top mounting assembly by a quick disconnect.