A guide for energy and money saving LED lighting
the next few years, the shift to LED lighting will be huge. LED lights will
capture 60% of the world’s demand for new lighting, and the shift will be
motivated not only by a global response to climate change, but especially by
the economic benefits of LED lights. High-brightness LEDs have emerged within
the last few years, but only recently have they been seriously looked upon as a
feasible option in general purpose lighting applications.
LED lighting standards will save you money to a higher degree. Common light
bulbs now sold in the United States typically use about 25%-80% less energy
than traditional incandescents. Many bulbs meet these new standards, including
halogen incandescents, CFLs, and LEDs. The new bulbs provide a wide range of
choices in color and brightness, and many of them last much longer than
traditional light bulbs. The lighting standards, which phased in from
2012-2014, do not ban incandescent or any specific bulb type; they say that bulbs
need to use about 25% less energy. The bipartisan Energy Independence and
Security Act of 2007 (EISA 2007) established these efficiency standards.
new energy-saving light bulbs — halogen incandescents, CFLs, and LEDs — could
save you about $50 per year when you replace 15 traditional incandescent bulbs
in your home. The new efficiency standards require light bulbs to consume less
electricity (watts) for the amount of light produced (lumens). For example, the
traditional, inefficient incandescent 100 watt (W) bulbs gave way to choices —
including halogen incandescent bulbs — that use only 72W or less to provide you
a comparable amount of light (lumens). If you are replacing a 100W bulb, a good
rule of thumb is to look for a bulb that gives you about 1600 lumens. Your new
bulb should provide that level of brightness for no more than 72W, cutting your
LEDs are different from other light bulbs?
understand how LED bulbs are different from other light bulbs, it is essential
to have an idea of how other light bulb technologies (incandescent bulbs and
CFL bulbs) work.
are more durable than either of the
above mentioned technologies. They are unbreakable and are more
energy-efficient. They do not contain any hazardous materials either. LEDs are
also relatively cool and will not heat up the room like incandescents do.
Though they cost much more than CFLs and incandescent, their long life span is
a big advantage for the buyers. Traditional incandescent bulbs had to be bought
regularly. LED bulbs can last as long as some lamps do. Therefore, the initial
investment lasts a purchaser much longer than other bulbs.
Fluorescent lights and CFLs
lights are tubes filled with fluorine gas and have no filament. They pass
electricity through the gas, which makes the glass glow. Fluorescent lights
produce much less heat, so they use much less electricity than incandescent
bulbs, and they last much longer. Their light is naturally bluish and they tend
to flicker. Older designs also contain mercury, which is toxic. CFLs are
designed to fit into light fixtures originally intended to take incandescent.
Few also have filters to make their light appear yellower.
bulbs are the traditional bulbs which were popularized by Thomas Edison. They produce
light by forcing electricity through a tiny tungsten coil. The coil, or
filament, resists the electricity, and the resistance creates both light and
heat. After a certain time, the filament burns out. Since much of the energy
these bulbs use is turned into heat rather than visible light, they are very
inefficient. They use much more electricity than newer technologies.
people prefer the color of incandescent lights but in most ways LEDs outperform
incandescent and even CFLs. To compare the efficiency of LED bulbs to other
bulbs, we should follow the lumens to watts ratio. Lumens measure light
intensity and watts measure electrical usage, so the higher the ratio, the more
light any given bulb gives off for the same amount of electricity.
Different types of LED bulbs available in the
when considering only bulbs designed for household lighting, there are
different types of LEDs to choose. Since the bulb must fit in the lamp, make
sure to select a shape, size, and base configuration that matches the bulb that
is being replaced. One should also consider the light intensity and color.
are four basic shapes for LED bulbs: A –
line bulbs, floodlights, spotlights, candle bulbs. Other shapes are also
there but they are less common. One reason bulb shape matters is that unlike
the other lighting technologies, LEDs are directional, like flashlights. If an
LED must light up a wide area, it has to be designed specifically for this
function. Floodlights and A-line bulbs have wide angles. Floodlights suit
recessed lighting and outdoor lighting, while A-line bulbs are good as room
lamps. Spotlights have a narrow beam while Candle bulbs are shaped like candle
flames and are designed for chandeliers and wall sconces. Though their beam is
directional, they do provide ambient light.
implies the shape of the bulb where it attaches to the fixture. If there is any
doubt about the base configuration, take an old bulb to the store and look for
a match. If buying online, compare photographs and measurements. Most household
light fixtures require bulbs with screw-in, or Edison bases. Some of the most
common sizes for Edison based are: miniature candelabra, candelabra,
intermediate, and medium.
is measured in lumens. While replacing an incandescent or CFL bulb with an LED
bulb, you should look for one that produces the same number of lumens that the
old bulb did. Do not use watts as a measure of brightness; watts actually
measure electricity usage, which varies between different bulb technologies.
is more energy-efficient to replace an incandescent with an LED. However, if
replacing all the bulbs in the house with LED bulbs is seems expensive, begin
with the light fixtures that are used the most often.
older technology bulbs produce light in only one color; additional colors are
created by tinting the shell of the bulb. LEDs do not need tints and filters.
Depending on the design, an LED can create light in several different colors.
Some can even produce more than one color. While some LED bulbs produce a
slightly bluish white light, others produce a much warmer, soft white tone. For
indoor use, warm white is the preferred choice, and cooler tones can look
unflattering. LED bulbs in other colours, like red, green, and blue are also
choosing a color, the two considerations are: color rendering, or how well the
light shows the true color of objects, and temperature. The higher the
temperature, the brighter the white. Bulb temperature is measured in Kelvins,
and warm white LEDs are usually between 2,500 and 3,000 K. Bright white is
4,500 to 5,000 K. Color rendering is measured on a scale of 1 to 100. LEDs
generally score as high as 85.