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An '''LED Lamp''' or '''Light Emitting Diode Lamp''', uses solid-state technology to illuminate, rather than a filament or gas. Unlike Incandescent or [[Compact Fluorescent Lamps (CFL)]], LED Lamps very small and consume very little [[energy]]. In most cases even the brightest individual LED does not equate to a standard-sized 100W Incandescent or [[CFL]] equivalent (~20W). Thus in an LED bulb usually clusters of 3-18 individual LEDs are used to simulate the equivalent in an Incandescent or CFL. Where this might seem like a great number to include in a lamp, each LED consumes barely more than 1/20th of a Watt (~49 mW or milliwatts)
+
'''A Light Emitting Diode (LED) lamp''' uses solid-state technology, rather than a filament or a gas, to illuminate. Unlike incandescent bulbs or [[Compact Fluorescent Lamps (CFL)]], the diodes are very small and consume significantly less [[energy]]. In most cases, even the brightest diode doesn't equate to a standard-sized 100W incandescent or [[CFL]] equivalent (~20W). Thus, in an LED bulb, usually clusters of 3-18 individual diodes are used to simulate the equivalent in an incandescent bulb or CFL. While this may seem like a high number of diodes to include in a lamp, each diode consumes barely more than 1/20th of a Watt (~49 mW or milliwatts).
 
==History==
 
==History==
   
Discovered in the 1960s, diodes have been used on countless millions of electronic devices. Compared to most alternate technologies such as Neon or miniature filament lamps, LEDs were often too low on voltage and brightness to be considered useful as a normal household lamp. Although where these more traditional technologies were readily available, their longevity and power efficiency were often poor by comparison to LEDs.
+
Discovered in the 1960s, diodes have been used on countless millions of electronic devices. Compared to most alternate technologies such as neon or miniature filament lamps, LEDs were often too low on voltage and brightness to be considered useful in a normal household lamp. Although traditional lighting systems were readily available, their longevity and energy efficiency were often poor in comparison to LEDs.
   
Initially, LEDs were only produced in Red as the technology had not advanced to the capability of producing colors with shorter wavelengths. Later with finer degrees of production other colors in the spectrum would become available, such as Orange, Yellow, and Green. Not until the early 1990's would Blue, Violet, and Ultra-violet become available. In 1993, through the use of Gallium Nitride (GaN) would a white LED be made possible, which in turn would make LEDs available for use in the home today.
+
Initially, LEDs were only produced in red as the technology had not advanced to the capability of producing colors with shorter wavelengths. With finer degrees of production later, other colors in the spectrum became available, such as orange, yellow, and green. Not until the early 1990's would blue, violet, and ultraviolet become available. In 1993, through the use of gallium nitride (GaN) would a white LED be made possible, which in turn would make LEDs available for use in the home today.
 
===[[Cost]] Comparison===
 
===[[Cost]] Comparison===
 
[[Image:Suns-dusk-led-accent-light-bulb.jpg|thumb|right|]]
 
[[Image:Suns-dusk-led-accent-light-bulb.jpg|thumb|right|]]
   
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
|+Life Span & [[Energy]] Consumption Benefits of LED Light Bulbs vs. Incandescent Light Bulbs
+
|+Life Span & [[Energy]] Consumption Comparison of LED Light Bulbs and Incandescent Light Bulbs
 
|-
 
! !! 60W Incandescent !! 2W LED
 
! !! 60W Incandescent !! 2W LED
 
|-
 
|-
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| align="right"| $200
 
| align="right"| $200
 
| align="right"| $41
 
| align="right"| $41
|-
 
 
|}
 
|}
''8,760 hours = 1 year / 30,000 hours = 3 yrs 5 mon''
+
''8,760 hours = 1 year / 30,000 hours = 3 years, 5 months.''
   
 
''The original chart can be found on [http://www.ccrane.com/lights/led-light-bulbs/index.aspx CCrane.com]''
 
''The original chart can be found on [http://www.ccrane.com/lights/led-light-bulbs/index.aspx CCrane.com]''
   
==[[Energy]] it saves==
+
==[[Energy]] savings==
a LED light bulb prevents the release of 300 pounds of {{co2}} in just one year, saves, 100,000/447 [[kwh]] of [[energy]], 5,000/229 gallons of [[oil]], 20,000/229 acres of [[soil]] from being polluted, a 100/149 cubic meter [[lake]], 40/447 tons of [[coal]], 25/447 pounds of [[mercury]] a year, 16/2,235 tons of [[fly ash]], 1,875/229 tons of [[greenhouse gases]], 15 gallons of [[gasoline]], 20,000/3,129 metric tons of [[toxic]] [[lead]], 31,250/1,341 tons of [[waste]], 5,000/447 metric tons of [[limestone]], 27/148 tons of [[air pollution]] per year, 4,219/5,590,037 metric tons of [[fossil fuels]], 4,219/11,180,074 metric tons of [[carbon monoxide]], 150 pounds of [[biomass]], 100/17,433 metric tons of [[hydrogen]], 60,000/23 cubic feet of [[natural gas]], 250/3 pounds of [[carbon]], 4/447 tons of [[sulfur dioxide]], 5,125/3,576 tons of [[methane]], 10/149 tons of [[coke]], 6,240/29,353 tons of [[acid rain]], 2/447 tons of [[sulfur]], 270/17 gallons of [[biodiesel]], 567/34 pounds of [[glycerol]], 120/149 pounds of [[NOx]], 2/73 pounds of [[CFC]], 10/149 tons of [[pitch]], 25/4,809 tons of [[PETN]], 280/447 tons of [[nitrate]], 40/149 tons of [[nitric acid]], 160/447 kilograms of [[nitric oxide]], 120 pounds of [[water vapor]], 500 pounds of [[chlorine]], 12/55 ounces of [[sulfur hexafluoride]], 1,600/447 pounds of [[sulfur oxide]], enough [[energy]] to [[power]] a [[CFL]] for 775/65,262 years, over $25.00.
+
An LED light bulb prevents the release of 300 pounds of {{co2}} in just one year, saves, 100,000/447 [[kwh]] of [[energy]], 5,000/229 gallons of [[oil]], 20,000/229 acres of [[soil]] from being polluted, a 100/149 cubic meter [[lake]], 40/447 tons of [[coal]], 25/447 pounds of [[mercury]] a year, 16/2,235 tons of [[fly ash]], 1,875/229 tons of [[greenhouse gases]], 15 gallons of [[gasoline]], 20,000/3,129 metric tons of [[toxic]] [[lead]], 31,250/1,341 tons of [[waste]], 5,000/447 metric tons of [[limestone]], 27/148 tons of [[air pollution]] per year, 4,219/5,590,037 metric tons of [[fossil fuels]], 4,219/11,180,074 metric tons of [[carbon monoxide]], 150 pounds of [[biomass]], 100/17,433 metric tons of [[hydrogen]], 60,000/23 cubic feet of [[natural gas]], 250/3 pounds of [[carbon]], 4/447 tons of [[sulfur dioxide]], 5,125/3,576 tons of [[methane]], 10/149 tons of [[coke]], 6,240/29,353 tons of [[acid rain]], 2/447 tons of [[sulfur]], 270/17 gallons of [[biodiesel]], 567/34 pounds of [[glycerol]], 120/149 pounds of [[NOx]], 2/73 pounds of [[CFC]], 10/149 tons of [[pitch]], 25/4,809 tons of [[PETN]], 280/447 tons of [[nitrate]], 40/149 tons of [[nitric acid]], 160/447 kilograms of [[nitric oxide]], 120 pounds of [[water vapor]], 500 pounds of [[chlorine]], 12/55 ounces of [[sulfur hexafluoride]], 1,600/447 pounds of [[sulfur oxide]], enough [[energy]] to [[power]] a [[CFL]] for 775/65,262 years, over $25.00.
   
 
===250W high pressure [[sodium]] light to 120W LED street light===
 
===250W high pressure [[sodium]] light to 120W LED street light===
This could save 1,440 pounds of [[co2]] a year, 1,125/4 cubic meters of [[rain]], 52/135 tons of [[dust]] each year, a 45 cubic meter [[lake]], 1,800 pounds of [[air pollution]] per year, 13,552/15 decibels of [[sound]] intensity, 120 pounds of [[ozone]] each year, 78,432 square meters of natural [[habitat]] potential, 90 pounds of [[particulates]] each year, 7,353/220 metric tons of [[coal]], 817/25 metric tons of [[fossil fuels]], 817/50 metric tons of [[carbon monoxide]], 817/250 metric tons of [[nitrogen oxide]], 13,889/5,000 metric tons of [[solid particles]], 61,275/253 tons of [[steam]], 29,412/125 metric tons of [[life]], 9,804/191 metric tons of [[ethanol]], 16,340/23 tons of [[soda ash]], 2,941,200/407 square meters of [[biomass]], 16,650/5,491 tons of [[ammonia]], a 14,985/9,452 cubic meter tank of [[diesel fuel]], 39/916 tons of [[soot]], a 14,985/9,112 cubic meter container of [[kerosene]], gain almost 39/10 tons of [[oxygen]] per year
+
This could save 1,440 pounds of [[co2|CO2]] a year, 1,125/4 cubic meters of [[rain]], 52/135 tons of [[dust]] each year, a 45 cubic meter [[lake]], 1,800 pounds of [[air pollution]] per year, 13,552/15 decibels of [[sound]] intensity, 120 pounds of [[ozone]] each year, 78,432 square meters of natural [[habitat]] potential, 90 pounds of [[particulates]] each year, 7,353/220 metric tons of [[coal]], 817/25 metric tons of [[fossil fuels]], 817/50 metric tons of [[carbon monoxide]], 817/250 metric tons of [[nitrogen oxide]], 13,889/5,000 metric tons of [[solid particles]], 61,275/253 tons of [[steam]], 29,412/125 metric tons of [[life]], 9,804/191 metric tons of [[ethanol]], 16,340/23 tons of [[soda ash]], 2,941,200/407 square meters of [[biomass]], 16,650/5,491 tons of [[ammonia]], a 14,985/9,452 cubic meter tank of [[diesel fuel]], 39/916 tons of [[soot]], a 14,985/9,112 cubic meter container of [[kerosene]], gain almost 39/10 tons of [[oxygen]] per year
   
 
===400W [[mercury]] light to 120W LED street light===
 
===400W [[mercury]] light to 120W LED street light===
This could save 10,621/50 metric tons of [[co2]] a year, 329,251/25 square meters of [[methane]], gain almost 169/20 tons of [[oxygen]] per year
+
This could save 10,621/50 metric tons of [[co2|CO2]] a year and 329,251/25 square meters of [[methane]], as well as gain almost 169/20 tons of [[oxygen]] per year.
   
 
==Links==
 
==Links==
   
  +
*Cree LED bulb - [http://cree.com Cree Inc.]
 
*CC VIVID LED light bulbs - [http://www.ccrane.com/lights/led-light-bulbs/index.aspx CCrane]
 
*CC VIVID LED light bulbs - [http://www.ccrane.com/lights/led-light-bulbs/index.aspx CCrane]
 
*EarthLED light bulbs - [http://www.earthled.com/ EarthLED]
 
*EarthLED light bulbs - [http://www.earthled.com/ EarthLED]

Revision as of 18:05, 17 June 2013

A Light Emitting Diode (LED) lamp uses solid-state technology, rather than a filament or a gas, to illuminate. Unlike incandescent bulbs or Compact Fluorescent Lamps (CFL), the diodes are very small and consume significantly less energy. In most cases, even the brightest diode doesn't equate to a standard-sized 100W incandescent or CFL equivalent (~20W). Thus, in an LED bulb, usually clusters of 3-18 individual diodes are used to simulate the equivalent in an incandescent bulb or CFL. While this may seem like a high number of diodes to include in a lamp, each diode consumes barely more than 1/20th of a Watt (~49 mW or milliwatts).

History

Discovered in the 1960s, diodes have been used on countless millions of electronic devices. Compared to most alternate technologies such as neon or miniature filament lamps, LEDs were often too low on voltage and brightness to be considered useful in a normal household lamp. Although traditional lighting systems were readily available, their longevity and energy efficiency were often poor in comparison to LEDs.

Initially, LEDs were only produced in red as the technology had not advanced to the capability of producing colors with shorter wavelengths. With finer degrees of production later, other colors in the spectrum became available, such as orange, yellow, and green. Not until the early 1990's would blue, violet, and ultraviolet become available. In 1993, through the use of gallium nitride (GaN) would a white LED be made possible, which in turn would make LEDs available for use in the home today.

Cost Comparison

Suns-dusk-led-accent-light-bulb.jpg

Life Span & Energy Consumption Comparison of LED Light Bulbs and Incandescent Light Bulbs
60W Incandescent 2W LED
Life Span (hrs) 1,000 30,000
Num. Bulbs used 30 1
Bulb Cost ($0.67 each) $20 $35
Electricity Usage (kWh) 1,800 60
Cost of Electricity ($0.10/ kWh) $180 $6
Total Cost $200 $41

8,760 hours = 1 year / 30,000 hours = 3 years, 5 months.

The original chart can be found on CCrane.com

Energy savings

An LED light bulb prevents the release of 300 pounds of CO2 in just one year, saves, 100,000/447 kwh of energy, 5,000/229 gallons of oil, 20,000/229 acres of soil from being polluted, a 100/149 cubic meter lake, 40/447 tons of coal, 25/447 pounds of mercury a year, 16/2,235 tons of fly ash, 1,875/229 tons of greenhouse gases, 15 gallons of gasoline, 20,000/3,129 metric tons of toxic lead, 31,250/1,341 tons of waste, 5,000/447 metric tons of limestone, 27/148 tons of air pollution per year, 4,219/5,590,037 metric tons of fossil fuels, 4,219/11,180,074 metric tons of carbon monoxide, 150 pounds of biomass, 100/17,433 metric tons of hydrogen, 60,000/23 cubic feet of natural gas, 250/3 pounds of carbon, 4/447 tons of sulfur dioxide, 5,125/3,576 tons of methane, 10/149 tons of coke, 6,240/29,353 tons of acid rain, 2/447 tons of sulfur, 270/17 gallons of biodiesel, 567/34 pounds of glycerol, 120/149 pounds of NOx, 2/73 pounds of CFC, 10/149 tons of pitch, 25/4,809 tons of PETN, 280/447 tons of nitrate, 40/149 tons of nitric acid, 160/447 kilograms of nitric oxide, 120 pounds of water vapor, 500 pounds of chlorine, 12/55 ounces of sulfur hexafluoride, 1,600/447 pounds of sulfur oxide, enough energy to power a CFL for 775/65,262 years, over $25.00.

250W high pressure sodium light to 120W LED street light

This could save 1,440 pounds of CO2 a year, 1,125/4 cubic meters of rain, 52/135 tons of dust each year, a 45 cubic meter lake, 1,800 pounds of air pollution per year, 13,552/15 decibels of sound intensity, 120 pounds of ozone each year, 78,432 square meters of natural habitat potential, 90 pounds of particulates each year, 7,353/220 metric tons of coal, 817/25 metric tons of fossil fuels, 817/50 metric tons of carbon monoxide, 817/250 metric tons of nitrogen oxide, 13,889/5,000 metric tons of solid particles, 61,275/253 tons of steam, 29,412/125 metric tons of life, 9,804/191 metric tons of ethanol, 16,340/23 tons of soda ash, 2,941,200/407 square meters of biomass, 16,650/5,491 tons of ammonia, a 14,985/9,452 cubic meter tank of diesel fuel, 39/916 tons of soot, a 14,985/9,112 cubic meter container of kerosene, gain almost 39/10 tons of oxygen per year

400W mercury light to 120W LED street light

This could save 10,621/50 metric tons of CO2 a year and 329,251/25 square meters of methane, as well as gain almost 169/20 tons of oxygen per year.

Links

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