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General Lighting -provides an area with overall illumination. Also
known as ambient lighting, general lighting radiates a comfortable level
of brightness, enabling one to see and walk about safely. It can be
accomplished with chandeliers, ceiling or wall-mounted fixtures, recessed
or track lights, and with lanterns outside your home. A basic form of
lighting that replaces sunlight, general lighting is fundamental to a
lighting plan.
Task lighting -helps you perform specific tasks such as reading, sewing,
cooking, homework, hobbies, games, or balancing your checkbook. It can
be provided by recessed and track lighting, pendant lighting, and
portable lamps. Task lighting should be free of distracting glare and
shadows and should be bright enough to prevent eyestrain.
Accent Lighting- adds drama to a room by creating visual interest. As
part of a decorating scheme, it is used to spotlight paintings, houseplants,
sculpture, and other prized possessions, or to highlight the texture of a
wall, drapery or outdoor landscaping. Accent lighting requires at least
three times as much light on the focal point as the general lighting around
it. This usually is provided by track, recessed, or wall-mounted fixtures.
Architecture:
Probably the largest impacts on electric lighting requirements and design come from
the architectural orientation, massing, ceiling height, and section profiles that
determine daylight availability in the building. Typically, south facing orientations,
narrow floor plates, high ceilings, and open sections tend to bring more usable
daylight into the building and correspondingly reduce the electric lighting use.
Lighting designers should be brought onto the project team early in the design
process so that they might have an impact on these early siting and massing
decisions.
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Interior Design:
Interior design choices, such as surface finishes, can have a dramatic impact on the
lighting system and how much light is required to make a space feel bright. Dark
wood finishes require more light (and electricity) to brighten a space than light
colored surfaces. The visual elements of lighting equipment must also coordinate
with the interior design.
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Structural Coordination:
Lighting designers must understand how a lighting system might
be incorporated into structural elements: coves, beams, and
columns; as well as what structural components may become
lighted surfaces.
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As part of a whole building design process, lighting designers develop an electric
lighting solution that addresses:
Daylighting—the design should supplement the available daylight
Task / Ambient / Accent systems—a lighting system that layers these components
provides flexibility in its use and comfort.
Control of systems—with daylight, occupancy, vacancy, schedule, time, and user
preference.
Efficient and effective luminaires—making the best use and distribution of the light
source.
Efficacious light sources—designer should choose the most efficacious (lumens of light
per watt of power) that still accomplishes the design goal for that source and luminaire.
Exterior Lighting—while enough light needs to be provided for nighttime visibility, too
much can cause glare, adaptation problems, and light trespass.
Fluorescent Lighting
Though commonly found in commercial lighting systems, fluorescent (or "gas
discharge") lighting has come a long way. Always known for their efficiency and
low cost, modern fluorescent lighting is available in warmer colors similar to
traditional incandescent lighting. In addition, fluorescents run cooler than
incandescent bulbs, making them a safe, affordable and ecologically friendly
lighting source.
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Controlling lighting through a dimmer is a
great way to save money on your electric bill,
and increase the life of most bulbs. Typically
solid-state devices, dimmers switch lights off
and on approximately 120 times per second,
creating the perception of relative brightness.
By being "on" less often than non-dimmed
lighting, dimmer-controlled lights use less
electricity. And dimming lights by 25%, for
example, will extend the life of the typical
bulb by four times.
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Replacing energy-wasting incandescent bulbs
with CFL'S (Compact Fluorescent Light Bulbs)
is an easy way to extend the life of your light
bulbs while enjoying significant energy
savings.
It is estimated that Just one CFL can cut energy
consumption by 75%.
They're available in different shapes and sizes
to fit almost any indoor or outdoor fixture.
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Compact Fluorescent Light Bulbs last upto 10
times longer than incandescent bulbs.
CFLs may cost more to purchase then oldfashioned incandescent light bulbs, but the
resulting energy savings more than offset the
difference.
By using 50% to 70% less energy, CFLs mean
lower utility bills for the user, less strain on the
environment, and less global warming
emissions.
THANK YOU
0MAR MALACK MOAMED
B02/53823/2012