Abstract:
To reduce the electric power demand in lighting the inside of buildings, apparatus and method for determining the most efficient lighting method, when comparing for example incandescent lighting with fluorescent lighting based on electric power demand for most efficient lighting, is disclosed.

Description:
BACKGROUND OF THE INVENTION 
     Electric power requirements in a lighting system can be reduced by monitoring to attain highest efficiency of lighting for reduced power demand, which reduction is reflected in reduced transmission and power generation. demand. 
     SUMMARY OF INVENTION 
     Disclosure is made of apparatus and a method, to choose between sources of electric lighting such as incandescent single point of light, and a fluorescent area light system. The method of choice of light source based on the electric power cost per room area, at a given light level. 
     OBJECTS OF THIS INVENTION 
     An object of this invention is to disclose apparatus for determining light production efficiency on comparison of different light sources, such as incandescent single point light source compared to fluorescent light source, computer monitored for comparison of electric power demand of each of the above light sources at the same light level or intensity for greatest efficiency of lighting, at the work plane, based on electric power demand. 
     Another object of this invention is to disclose a method for determining light production efficiency on comparison of incandescent single point light source with area fluorescent light source, computer monitored for comparison of electric power demand on controlled on-off switching of each of the above light sources at the same light level or intensity for greatest or highest efficiency of lighting, at the work plane, based on electric power demand. 
     Prior art U.S. patents pertaining to this present application are; 
     U.S. Pat. No. 4,701,698 for—ENERGY CONSUMPTION METER. 
     U.S. Pat. No. 4,933,633 for COMPUTER CONTROLLED ENERGY MONITORING SYSTEM 
     U.S. Pat. No. 5,315,236 for POWER CONSUMPTION METER. 
     None of these prior patents would anticipate individually the claims in this application, or on combining the patents would make obvious the matter claimed in the application. 
    
    
     BRIEF DESCRIPTION OF DRAWINGS 
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     LEGEND DESCRIPTIONS 
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     DETAILED DESCRIPTION OF THE INVENTION 
     Adequate lighting of a building or work area is costly, in terms of direct dollars, and cost of generating and transmission of electric power, to be more light efficient requires an analysis of the light source. 
     This invention discloses apparatus and lay out of monitor circuit FIG. 5 for determining light production efficiency on comparison of single point incandescent light source  1  (FIG. 1 elevation view, FIG. 2 plan view) with area fluorescent light source  2  (FIG. 3 elevation view, FIG. 4 plan view), a computer  6 , power supply  5 , main meter  13 , a power line  14  from meter  13  to switch  12 , to meter  4  for fluorescent area light and line  16  from meter  14  to computer  6 , a light meter  8  for fluorescent area light measure connected to computer  6 , via line  18 , from fluorescent area light meter to computer  6 , and fluorescent area light electric power use  10 . then indicated in window  10  of computer  6 . The electric meter  3  for incandescent light  1  is connected via line  17  to computer  6 , and a switch  11  in power source line  15  connected to incandescent light  1  through meter  3 . Incandescent light meter  7 , connected to computer  6  via line  19 , for light meter readings of incandescent light  1 . Incandescent light electric power usage  9 , to show incandescent light electric power usage or register on the computer  6 , and fluorescent light electric power usage  10  shown on computer  6 . 
     In all of the above discussion the terms “connected to” or “line” means an “electric wire connection”. 
     The above described assembled apparatus then provides a method of measuring the electric power demand for each lighting source at the same lighting level thus the lighting power efficiency is indicated by comparison of the power demand of each source of lighting, and thus on determining and choosing the highest lighting efficiency helps to reduce the power demand and is reflected in being equivalent to a virtual power plant (VPP) because of the power savings. 
     In regards to the light sources, which are hung on a ceiling, the “incandescent” or incandescent, high intensity (HID) source is included as a single point source, while the “luminescent” light source is mentioned as an area down light source and includes a side by side assembly of straight or long fluorescent tubes, as assembled in a luminaire for downlighting. 
     The above description of the invention compares an incandescent light source with a fluorescent light source, but is not limited to the light sources shown, but includes apparatus for comparison of any light sources, as follows. 
     A first light meter  7 , and a second light meter  8  and the first light meter  7 , at a distance d from the first light source  1 , and the second light meter  8 , at a distance d from the second light source  2 , and an electric meter  3  in the power line source  15  to the first light source,  1 , and electric meter  4  in the power line source  14  to the second light source  2 . An electric switch  11  in the power line source  15  to the first light source  1 , and an electric switch  12  in the power line source  14  to the second light source  2 , and the power line source  15  to the first light meter  3  connected to a computer  6 , a power line source  14  to the second light electric meter  4  connected to the computer  6 , via line  16  and the first light meter  7 , connected to the computer  6  via line  19 , and a switch  22  in line  19  and the second light mater  8  connected to the computer  6  via line  18 , and a switch  23  in line  18 , connecting fluorescent area light second light source meter  8  and computer  6 . There is a switch  20  in line  17  which line connects electric meter  3  for incandescent first light source to computer  6 . 
     The term “first light source” includes incandescent light source, and the terms may be used interchangeably, also “second light source” may be used interchangeably with fluorescent area light. 
     Referring now to FIG. 6, this shows the mounting lay out of the monitor circuit components on the computer mount panel  25 . 
     The apparatus and method disclosed in this invention for determining the most efficient lighting per unit of electric power will aid in reducing the peak power load demand. 
     “d” distance between second light source and second light meter, may be varied to give adequate or the same light meter reading at the work plane as the first light meter reading.