Light-Emitting Diodes (LED’s) are
solid-state semiconductor devices that convert electrical energy
directly into visible light. LED bulb technology has advanced by
leaps and bounds in recent years, and continues to improve. LED
light bulbs have a functional lifetime that is far longer than the more
traditional lighting technologies.
- LED light bulbs generally use
significantly less energy than incandescent bulbs. (up to 70%-90%
- LED light bulbs typically
experience extremely long life compared to incandescent light bulbs.
(up to 100,000 hours)
- LED light bulbs are generally
environmentally friendly and do not contain mercury.
- LED light bulbs ARE the future of
- LED light bulbs do not emit
harmful UV rays.
- Many US states, countries and the
EU phasing out incandescent bulbs in the near future.
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Light-Emitting Diodes (LED’s) are solid-state
semiconductor devices that convert electrical energy directly into visible
The inside of an LED is made up of various semiconductor materials. When an
electrical current passes through the diode, the recombination of positive
and negative charges within the different compositions results in the
emission of photons (light). The selection of different semiconductor
materials will affect the frequency (color) of the emitted light. LED’s are
direct-current (DC) devices that require a transformer to convert
alternating current (AC) to DC. The transformer also maintains a quality
electrical supply for the LED device.
Almost all of the energy in an LED radiates within the visible spectrum. By
contrast, incandescent light sources have the lowest efficiency of all
conventional sources because a major portion of its emitted energy appears
in the infra-red (IR) region of the spectrum. Other sources, such as
fluorescent and HID lamps have a higher efficiency but still have loss
mechanisms in the electrodes and within the discharge itself. Fluorescent
lamps have additional losses in the conversion of the UV radiation to
visible radiation by the phosphor.
Advantages of using LED technology include:•High-levels of brightness and
intensity •High-efficiency •Low-voltage and current requirements •Low heat
•High reliability (resistant to shock and vibration) •No UV Rays •Can be
easily controlled and programmed
The Future of Light
Over the past several years, LED technology has advanced by leaps and
bounds. In the past, lack of colors and the low intensity made LED’s useful
only as indicator lights. As the manufacturing methods and technology have
improved, the LED has quickly found itself suitable in many more
applications. As this technology advances further and more applications are
attained, the light emitting diode will be the light source of choice for
virtually all lighting scenarios.
Long Life Reliability
LED’s have a functional lifetime that is far longer than the more
traditional lighting technologies. However, contrary to some claims, LED
life is finite, and will vary with color and chip make-up. LED’s will
degrade over their life span.
An LED can last from 30,000 to 100,000+ hours, almost 50 times longer than
most incandescent light sources (2000 hours) or up to 10 times longer than
fluorescent sources (10,000 hours).
Realizing rated LED lamp life is dependent on meeting LED manufacturer’s
- operating temperature
- operating voltage & current
- electrical junction temperature
- thermal dissipation
The luminous efficacy (lumens/watt) of LEDs vary with color. Currently white
LEDs are measuring between 20- 60 lm/W. This variance is subject to
differences in chromaticity as well as wattage. The U.S. Department of
Energy recently released a study that estimates efficacy to be 100 lms/W by
2010. By one estimate, replacing the incandescent traffic signals in the
United States alone with LED signals would save nearly 2.5 billion kWh
annually. Red traffic lights, for example, pay back their initial investment
in 2.5 to 3 years through energy savings. Savings due to reduced maintenance
are significant, and can be a leader in cost savings when replacement is
difficult or expensive.
Reliability and Lumen Maintenance
Lumen maintenance is the amount of light emitted from a source at any given
time relative to the light output when the source was first measured. This
is usually expressed as a percentage. If you've ever changed a light bulb
and noticed how bright a new bulb is when compared with the older bulb,
you're seeing the effects of lumen depreciation. This steady decline over
time is known as lumen maintenance (L). The materials inside the bulb will
continue to deteriorate until finally the bulb will no longer emit any
light. This is known as the bulb's mortality (B). With conventional light
sources, the bulb usually fails before our eyes notice the change in lumen
LED’s also experience lumen depreciation but it happens over a much longer
period of time, usually tens of thousands of hours. Compared to conventional
light sources, you notice very little degradation of light with LED’s.
Benefits of LED Bulbs
a few reasons to go LED....
- Save money and energy by using LED bulbs. Generally, an LED consumes less
than 0.1 watt to operate. This incredibly low consumption means you will
save on your energy costs right from the start.
- The typical LED bulb will last for 50,000 hours. This is over 10 Years of
light from One Bulb used half the time. Compared to an incandescent bulb,
which lasts 1,000 hours, a halogen bulb lasts 2,000 hours, and a compact
fluorescent bulb may last up to 10,000 hours.
- The extremely long life of an LED bulb will virtually eliminate your
maintenance costs. There will be no need to change light bulbs throughout
- LED’s are environmentally friendly, they are made from non-toxic materials
unlike fluorescent bulbs which contain Mercury.
The study results show that over the entire life of the bulb – from
manufacturing to disposal – the energy used for incandescent bulbs is almost
five times that used for compact fluorescents and LED lamps.
The energy used during the manufacturing phase of all lamps is insignificant
– less than two percent of the total. Given that both compact fluorescents
and LEDs use about 20 per cent of the electricity needed to create the same
amount of light as a standard incandescent, both lighting technologies put
incandescents to shame.
Using high power Light Emitting Diode as a replacement for tungsten filament
lamps and halogen lamps. We offer a variety of household solid lamps,
including floodlights, spotlights and track lighting, colored and color
changing lights, and more. We also have high power solid lamps using the
newest SMD technology. These solid lighting output more light while using
even less electricity. It can be used with your existing light fittings.
Available as Edison E27, MR16 (2 pins), GU10(bayonet), PAR series etc
fittings. Green Light Source, Energy efficient lighting products, home solid
LEDs are better energy efficiency over incandescent bulbs and most halogen
bulbs, Saving energy 80% to 90%
LEDs are very long operating life (up to 100,000 hours)
Low voltage DC operation (12V AC/DC) or Mains voltage operation (Input
voltage between AC 85V and AC265V, Or any voltage for customized design.)
Cool light output (no UV or heat energy)
Narrow, medium and wide angle lenses
Any combination of lighting colors (Warm White (2700K to 4300k), Daylight
white / Pure White (5000K to 6500K, it is equivalent to natural sunlight in
color), Cool white (up to 8000K), Amber, Orange, Pink, Red, Cyan, Blue,
Royal Blue, Green)
The familiar incandescent Edison bulb debuted 130 years ago, on December 31,
1879. And the next day, its death spiral will begin. Australia has imposed
regulations that will phase the bulb out in 2010 and the European Union will
follow in 2012.
The U.S. meanwhile, will get rid of them through new efficiency regulations
in stages. 100-watt incandescents will vanish in 2012, followed by 75-watts
a year later and 60-watts a year after that.
LEDs (Light Emitting Diodes) are solid light bulbs which are extremely
energy-efficient. Until recently, LEDs were limited to single-bulb use in
applications such as instrument panels, electronics, pen lights and, more
recently, strings of indoor and outdoor Christmas lights.
Manufacturers have expanded the application of LEDs by "clustering" the
small bulbs. The first clustered bulbs bulbs were used for battery powered
items such as flashlights and headlamps. Today, LED bulbs are made using as
many as 180 bulbs per cluster, and encased in diffuser lenses which spread
the light in wider beams. Now available with standard bases which fit common
household light fixtures, LEDs are the next generation in home lighting.
The high cost of producing LEDs has been a roadblock to widespread use.
However, researchers at Purdue University have recently developed a process
for using inexpensive silicon wafers to replace the expensive sapphire-based
technology. This promises to bring LEDs into competitive pricing with CFLs
and incandescents. LEDs may soon become the standard for most lighting
needs. We are following these developments with interest and will report the
latest updates in this research.
CRI - Coloring Rendering Index. CRI represents the quality of light and its
faithfulness to render colors correctly. Some LED bulbs, for example,
features a CRI of 75 for Cool White and 80 for Warm White making them one of
the highest in the industry.
CCT - Correlated Color Temperature is the measure used to describe the
relative color appearance of a white light source. CCT indicates whether a
light source appears more yellow/gold/orange or more blue, in terms of the
range of available shades of "white." CCT is given in kelvins (unit of
RGB - stands for red, green, and blue, the three primary colors of light.
When the primaries are mixed, the resulting light appears white to the human
eye. Mixing the light from red, green, and blue LEDs is one way to produce
white light. The other approach is known as phosphor conversion [see below].
Luminous Flux - the flow of light measured in lumens. With light bulbs, it
provides an estimate of the apparent amount of light the bulb will produce.
Red - red is the traditional color for maintaining night vision.
Green - green is now the preferred color for pilots and the military. The
green color is also great for retaining night vision, and it doesn’t erase
the red markings on maps and charts.
Blue - many people like the blue because it is very easy on the eyes. Blue
appears to be a good reading light for elderly eyes. Elderly folks report
that they can read under the blue light for hours without eyestrain,
compared to severe eyestrain in less than 30 minutes with incandescent
White - the most popular of the LED colors. It produces a soft white light,
without harsh reflection, glare or shadows.
Amber - LED amber bulbs do not attract flying insects, as do ordinary white
bulbs. Amber LEDs are used outdoors in areas such as patios and decks where
insects flying around lights are a nuisance.