Better use and control of discharge light sources can offer up to
80% improvement in the conversion of electricity to light. The
business opportunity arises from the trend in  Industrial lighting
away from HID Metal Halide lamps (57 maintained lumen per
watt efficiency) towards T5, HIF (High Intensity Fluorescent)
multiple lamp lighting fixtures. Using microprocessor controlled
luminaires with T5  lamps, HIF technology offers up to 78
maintained lumens per watt. That is 36% more efficiency than
using MH.  

The microprocessor controlled technology in conjuction with  
hybrid light source luminaires promises  up to an 80% higher 110
maintained lumen per watt  efficiency.
The High Efficiency Luminaire
invention takes advantage of
electronic control and power
supply developments to produce
an effective color-rendering "white"
light lighting fixture of superior
efficacy using the most efficient
light sources and extending the
use of the fluorescent lamp into
industrial and outdoor applications
where dirty environments and cold
temperatures limit their use.   
Sensitivity to temperature prevents T5s from attaining their rated efficiency in most HID
applications, especially those outside of the controlled air-conditioned environments of office
spaces.  Low-pressure mercury vapor lamps, otherwise known as fluorescents, are highly
sensitive to ambient temperatures. Fluorescents are rated -17°C starting temperature however
the light output will already be below 20% of the rated at 0°C. The efficacy of thin tube T5
fluorescents operating at higher ambient temperatures 35°C is typically 5 to 20% higher than the
older T12 and T8 25°C designs.
The efficiency gain over white light metal halide HID systems can be as high as 36%, however, at 0°C
(32°F) the T5 will only produce 20% of the light output at much reduced efficiencies. Thus while these
sources may theoretically operate at over 100 lumens per Watt (system Watts including control gear-
electronic ballast but not including luminaire inefficiencies), in practice, due to wide variance in ambient
temperatures in the upper reaches of high-bay buildings these efficiencies will not be achieved .

The T5 fluorescents have other advantages over HID lamps besides efficiency, including instant restrike,
superior lumen-maintenance, 94% vs. 65%, and small size. However, these light sources are unsuitable
for outdoor use in much of North America and Europe unless control of the ambient temperature can be
provided by the luminaire over the seasonal and daily temperature vagrancies. Controlling temperature by
placing in an enclosed fixture serves as a disadvantage in warm weather. ¬The light output will easily drop
by 20%.  
Increased Efficacy Illuminating Technology
The microprocessor
controller of the present
invention, using less than 2
watts of power,  provides for
the 100% light output of
these lamps from -18°C
(0°F) to 40°C (104°F).  This
provides hundreds of dollars
of savings per luminaire over
its lifetime.