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Multi-Level
H.I.D. Lighting |
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 Energy
Savings for HID Lighting through a multi-level control system.
With energy costs on the rise, there is a need for a better control of
energy usage. Efficient, well-designed lighting systems offer a
tremendous opportunity to reduce energy consumption while maintaining
productivity. The KiloWatch
system from Lithonia Lighting combines the high efficiencies and energy
savings of High Intensity Discharge lighting with proven control
technology, allowing you to have light when you need it...and save
energy when you don't. KiloWatch systems can reduce lighting
power cost by up to 40%
Many environments are occupied only a portion of any
given day. During the balance of the time, only minimum lighting levels
are required for safety. In a typical warehouse environment (applications
similar to picture on the left), loading docks and
shipping/receiving have the highest activity, but are contained in a
small percentage of the total square footage. The balance of the
warehouse usually contains aisles with rack storage locations that may
require occupancy only a couple of times a day. When there is no
occupancy in the aisles, the lighting level should not be a concern;
therefore, use of a sensor system with a 50% power reduction will
maximize energy savings. When a worker enters the space, KiloWatch
automatically switches the light level to full brightness, this level of
illumination is only required possibly 20% of the time. Then when
worker leaves the space, KiloWatch
switches the light level to low, possibly 80% of the time. The
energy-saving KiloWatch system
allows you to maintain a minimum lighting level at reduced power
consumption when areas are not in use, then gives almost instantaneous
full lighting when required. 
The expectations of a high school gymnasium (applications
similar to picture on the right) are no longer just basketball, they
are now multi-purpose facilities that include gymnastics, wrestling and
even baseball practice during the off season. With the wide array
of activities and more hours of operation, a multi-purpose system is
excellent for this changing environment. Physical education
classes or recreational basketball requires half the illumination that
the varsity basketball team would need to practice or for game play.
A traditional lighting system would be designed to the higher
foot-candle requirement. This level of illumination is only
required possibly 30% of the time. The use of the
KiloWatch system allows the luminaire to be switched to a
50% lumen reduction and still maintain the proper lighting for other
activities.
KiloWatch is the solution to
providing proper lighting for the work environment while conserving
energy and saving money.
The simple design of KiloWatch
permits easy installation and many years of
energy-efficient operation. A manually switched system
places the control of light levels at your fingertips, while
the second system utilizes sensing devices. Motion
detectors, photocells and other devices are incorporated to
control the light output automatically. Sensing devices
allow for maximum energy savings.
 | Typical manual
applications include : general activity areas,
institutional areas such as prisons, family life centers,
general offices, schools/gymnasiums and manufacturing
facilities. This system allows for high/low levels
to be manually controlled from single or multiple pole
switches. A control component is used in conjunction
with the system for lamp stabilization for a period of 15
minutes when initially energized daily. |
| Typical sensor
applications include : Warehouse aisle lighting, shipping
docks, storage areas, refrigerated areas, parking garages,
and airport baggage claim areas. This system
incorporates the use of infrared sensors which
automatically switch the lighting from low level to high
level when motion is detected and back to low when there
is no occupancy. This return to low delay function
of infrared motion sensor can be field adjusted from 1 to
20 minutes. A time delay of 15 minutes is built into
the sensor to allow for lamp stabilization at high when
the system is initially energized daily. |
 Further
information on the KiloWatch
system and ordering information, see the KW
Guide. A great educational tool on ordering proper
fixture and component nomenclature, plus details on manual and
sensor systems with RELOC modular wiring systems.
Pulse Start systems are compatible
with KiloWatch, it is
recommended taking advantage of Pulse Start systems where
applicable for greatest energy savings. Please see Pulse
Start Calculator for further information. Pulse
Start systems are designated in chart below Wattage/Source
with a SCWA ballast.
Lithonia's KiloWatch
dual-level system is designed around ease of installation,
simplistic operation, and proven technology.
Regardless of control method used, manual
switch or sensor, the luminaire electrical components are
identical. Lithonia uses standard ballast, capacitors,
and when required, ignitors. The control is accomplished
by adding a second capacitor and switching it in or out of the
circuit with a 120V or 277V AC control relay, installed in the
luminaire. The control relay is part of the luminaire
that is directly connected to the wall switch in a manual
system or the control sensor system by a separate 120V or 277V
AC control circuit.
In our continual efforts for energy savings
product we have added an integral
sensor system designed to control a single HID
fixture. The control is accomplished by adding a
second capacitor and switching it in or out of the circuit
with a solid state control relay, installed in the luminaire.
There is a armored cable connected to the side of a pendent
splice box on fixture that connects the relay to the sensor,
which mounts to the reflector. No extra system
wiring is needed for installation purposes. The integral
sensor system will maximize the possible energy savings in a
sensor application.
The KiloWatch
calculator allows you to compare full power output
versus a 50% power output for various lamps (a 50% lumen
output version is also available). To fully appreciate
the energy savings potential of the KiloWatch system, one must
understand the energy consumption of a standard lighting
system. Subtracting the energy consumption of the
KiloWatch system from a standard system reveals the total
energy savings using the KiloWatch multi-level lighting
system. All inputted watts are based on the most recent
published information from ballast manufacture. Up to
date details specific to input wattage should be verified with
ballast manufacture.
The KiloWatch
Calculator Excel (Version '97)
allows users to download program onto computer, moreover
calculates simple payback on estimated initial capital cost.
| |
Standard
System Performance |
50%
Power Reduction at Low
|
| Wattage/Source |
Input
Wattage |
%
Lamp Lumens |
Input
Wattage |
%
Lamp Performance |
| 175 Metal
Halide (CWA) |
213 |
100% |
115 |
35% |
| 175 Metal
Halide (SCWA) |
220 |
100% |
119 |
35% |
| 250 Metal
Halide (CWA) |
295 |
100% |
168 |
38% |
| 250 Metal
Halide (SCWA) |
288 |
100% |
164 |
38% |
| 320 Metal
Halide (SCWA) |
370 |
100% |
190 |
30% |
| 350 Metal
Halide (SCWA) |
400 |
100% |
212 |
35% |
| 400 Metal
Halide (CWA) |
458 |
100% |
231 |
23% |
| 400 Metal
Halide (SCWA) |
455 |
100% |
234 |
30% |
| 450 Metal
Halide (SCWA) |
506 |
100% |
275 |
30% |
| 1000
Metal Halide (CWA) |
1080 |
100% |
542 |
28% |
| 250 High
Pressure Sodium (CWA) |
295 |
100% |
173 |
23% |
| 400 High
Pressure Sodium (CWA) |
464 |
100% |
198 |
22% |
| 1000 High
Pressure Sodium (CWA) |
1100 |
100% |
565 |
37% |
| |
Standard
System Performance |
50%
Lumen Reduction at Low
|
| Wattage/Source |
Input
Wattage |
%
Lamp Lumens |
Input
Wattage |
%
Lamp Performance |
| 175 Metal
Halide (CWA) |
213 |
100% |
158 |
50% |
| 175 Metal
Halide (SCWA) |
220 |
100% |
163 |
50% |
| 250 Metal
Halide (CWA) |
295 |
100% |
208 |
50% |
| 250 Metal
Halide (SCWA) |
288 |
100% |
203 |
50% |
| 320 Metal
Halide (SCWA) |
370 |
100% |
243 |
50% |
| 350 Metal
Halide (SCWA) |
400 |
100% |
255 |
50% |
| 400 Metal
Halide (CWA) |
458 |
100% |
322 |
50% |
| 400 Metal
Halide (SCWA) |
455 |
100% |
312 |
50% |
| 450 Metal
Halide (SCWA) |
506 |
100% |
329 |
50% |
| 1000
Metal Halide (CWA) |
1080 |
100% |
705 |
50% |
| 250 High
Pressure Sodium (CWA) |
295 |
100% |
188 |
50% |
| 400 High
Pressure Sodium (CWA) |
464 |
100% |
350 |
50% |
| 1000 High
Pressure Sodium (CWA) |
1100 |
100% |
680 |
50% |
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