Led Light
New concept of green and energy saving lighting – LED lights
Semiconductor LEDs are semiconductor devices that convert electrical energy directly into light.
the thermal sources of light such as flames and incandescent filaments emit light when heated, either by chemical reaction (fire) or heating electrical (light bulbs). LED "cold" light lead generation more efficient manner because of the energy is radiated the visible spectrum.
Other common sources High luminous efficiency, such as fluorescent lamps and electro luminescent devices, also produce light without heat radiation far outside the visible spectrum.
Because LEDs are semiconductor devices can be extremely small and durable, they also provide the life of other light sources.
The light is generated within the chip, a solid crystal material, when current flows through the junctions of different material compositions.
An LED consists of two elements of the processed material called P-type semiconductor and N type semiconductor These two elements are placed in direct contact, forming a region called the pn junction. The composition of different materials determines the wavelength and therefore the color of the light.
LED is similar to most types of diodes of others, but there are important differences. The LED is a transparent package, allowing visible or IR energy to pass. In addition, the LED has a large area of union PN whose form is matched to demand. The device of Figure 1 is an AlGaInP LED because the semiconductor layers are aluminum (Al), gallium (Ga.), indium (In) and phosphate (P).
Principal LED
The semiconductor materials used to manufacture LEDs are:
* Indium gallium nitride (InGaN) blue, green and ultraviolet high-brightness LED
* Aluminium gallium indium phosphide (AlGaInP): yellow, orange and red high-brightness LEDs
* The aluminum gallium arsenide (AlGaAs) red LED and IR
* gallium phosphide (GAP), yellow and green LEDs
Why Why LED?
LEDs have a number of benefits that is making rapid the best solution for real energy efficient lighting. Over the years some aspects have changed significantly.
Life
As semiconductor diode sources have a long useful life and are generally very very solid thanks to the absence of mechanical or moving parts.
Incandescent bulbs have a life expectancy of 1k to 5k hours, while LED quality is often cited for having a life of 50k hours, more than five years of continuous use. However, it is important to understand that the performance of their LEDs in time and This degradation is strongly influenced by factors such as operating current and temperature.
Low maintenance
The long lifetime of LEDs reduces the need for replacing the lamps has failed, and this can lead to significant financial and environmental savings, including maintenance, labor and recycling. This makes the LED accessories used for installation in inaccessible places, but if the tasks such as cleaning of luminaires required, the sources light could be replaced while maintaining denial "low" advantage.
Efficiency
As a device semiconductor, LEDs are very effective. device technology today allows the realization of the latter to be pushed to limits that exceed the light standard.
Nature Management of the light produced by LEDs allows the design of the devices with a higher overall.
Low energy
The low power LED is a significant saving of energy that can often lead to the installation LED-based systems. the cost of acquiring a higher initial launch, but it can be shown to return the investment cost in a short period of time.
Brightness
output light is steadily increasing and there are several products that are producing higher than traditional light illumination.
Heat
LEDs do not produce heat as infrared radiation (IR), unlike incandescent bulbs making them hot to the touch.
This lack of heat can be used LED lighting in places where heat from conventional sources can cause a particular problem such as power, lighting, textiles, artifacts, etc.
However, no heat LED at the junction of semiconductors in the drive and good thermal management must be used in power machinery maintain the life of the operation
Cost
In many applications, LEDs are expensive compared to other light sources, when measured by indicators such as "£-by-light."
LED manufacturers continue to work to reduce their production costs while increasing output light of their devices.
However, the high initial cost of LED-based systems is offset by a decrease in energy consumption, lower maintenance costs and other factors.
The initial cost may seem high, but consider the use of electricity you save, they pay for themselves.
Electricity Reduced costs of switching to LED bulbs for direct replacement
LED Lamps 10W vs 75W halogen bulb comparison of the operating costs
Small Form Factor
The LEDs are very small – typical high brightness LED chips measure 0.3 mm by 0.3 mm, while devices High power can be 1 mm x 1 mm or more. There are many examples where the availability of advances in small markets, high brightness devices have led to significant. The obvious example is in mobile phones, where the blue LED, green and white are now used in most models back to the keyboards and light crystal display (LCD).
Switching instant
LED lights quickly, even cold, and this is a particular advantage for certain applications, such as vehicle brake lights.
Color
LEDs are available in a wide range of bright, saturated colors (though the results vary across the spectrum), and white devices are also available. The modules that contain different colored LEDs (typically red, green and blue or RGB) can be adapted to a wide range of colors, and easily adjusted. RGB modules offer a wider range of colors than white LEDs, or other traditional sources of light white, which is an advantage especially in applications such as backlighting liquid crystal displays (LCD).
RGB LED color mixing
LED characteristics change with time, temperature and current, and a camera. For RGB LED, operation of changing different colors at different speeds. This can lead to variations in color and intensity of the lamp, poor reproducibility.
LED vs Halogen
Types of LED Lighting
Now, LED bulbs have a wide application in the home, office, street, shop, park, so for the decoration and lighting LED lighting family includes mainly:
1. LED Ball Lamp
2. LED spot lamp
3. LED lamp standing
4. LED light tube
5. LED Rope Lights
6. LED pool lamp
7. LED light curtain
8. LED Christmas (holiday) light
9. Ceiling LED
10. LED road light
11. LED solar light
Etc.
In a word, LED lighting is the future of lighting, and no doubt soon to replace the halogen lamps future.
About the Author
Leading Manufacturer of LED screen & LED Light
Rank 1 – LED There Be Light [Trance Energy 2009 Anthem]
|
|
SE Wireless Motion Sensor Light – 10 Super-Bright LED $6.95 nstantly add motion-activated light for security and safety – indoors or out*Infrared technology senses both movement and heat for fewer false activations; daylight-off function*Compact (3″ x 3″) and lightweight (4.3 oz) lets you install almost anywhere; easy-mounting slot *10 super-bright LED cast pure white light, last for 100,000 hours, sip battery power*Wire-free installation, operates for mon… |
|
|
Mighty Bright XtraFlex2 Light (Silver) $16.98 XtraFlex2 Light – Silver… |
|
|
Fulcrum Products Light-It 6 LED Porch Light with Motion Sensor $21.43 If you are looking for a high-powered floodlight to provide added safety and security to the exterior of your home, look no further than the Outdoor Wireless Motion Activated LED Floodlight. This floodlight is perfect for the average do-it-yourselfer as it runs on batteries, so no outlet, wiring, or professional installation is required. It has a weatherproof casing that was designed to withstand … |
|
|
Led By the Light $17.49 … |
|
|
Rhodiumplated Square 22-mm Charms (Pack of 2) $7.05 These adorable charms feature a multiple-spearhead design created by TierraCast. With a light matte finish, these lead-free pewter charms are crafted of pewter metal with rhodium plating. |
|
|
Stainless Steel White LED Solar Lights (Set of 12) $64.99 White LED solar lights come in a set of 12Energy-saving landscape lighting is made with stainless steelSolar-powered lights require no wiring |
