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LED Light Bulbs - LED Downlight - LED Spotlight - LED Light Strips - LED Tube Light - LED Controller - LED Light Bar - LED Module - LED Power Supply - LED Accessories
Home | About us | News | Products | FAQs | Sitemap | Contact Us | Chinese
LED Light Bulbs - LED Downlight - LED Spotlight - LED Light Strips - LED Tube Light - LED Controller - LED Light Bar - LED Module - LED Power Supply - LED Accessories
LED is an abbreviation for a light-emitting diode. An LED is an electronic light source. A diode is not a light bulb. Traditional incandescent light bulbs heat tungsten filaments until they glow, like a toaster heating element. These filaments gradually evaporate until they break and burn out.
LEDs work on a totally different premise, similar to transistors or other electronics along those lines. There is no filament to burn out. They're also a much more efficient light source, producing considerably more light per watt than a traditional bulb. Most LEDs are about 2/10 of an inch in diameter and about 1/3 of an inch in length. Whereas typical household lamps require 120 volts, an LED uses just two or three volts. What's more, typical household lamps are rated for 1,500 to 2,000 hours while LEDs can last 100,000 hours or more.
Light emitting diodes, commonly called LEDs, are real unsung heroes in the electronics world. They do dozens of different jobs and are found in all kinds of devices. Among other things, they form the numbers on digital clocks, transmit information from remote controls, light up watches and tell you when your appliances are turned on. Collected together, they can form images on a jumbo television screen or illuminate a traffic light.
Basically, LEDs are just tiny light bulbs that fit easily into an electrical circuit. But unlike ordinary incandescent bulbs, they don't have a filament that will burn out, and they don't get especially hot. They are illuminated solely by the movement of electrons in a semiconductor material, and they last just as long as a standard transistor.
In this article, we'll examine the simple principles behind these ubiquitous blinkers, illuminating some cool principles of electricity and light in the process.
Traditionally LED bulbs have been driven using series resistance, this usually works okay if there are no external loads applied to the circuit which may affect it. If an external heavy load is applied when an LED bulb is running for example as the compressor or pump switch is turned on the current and the voltage immediately decrease. These dips in voltage and current seriously affect the lifetime of the LED bulb. Examples of heavy inductive loads include swimming pool pumps and large refrigerators, these can cause traditional incandescent and halogen bulbs to fail at times.
However, Constant current LED drivers have a small integrated circuit incorporated which sense any voltage variations within the lighting circuit and will automatically compensate for any losses.
LED bulbs are infinitely more susceptible to current and voltage spikes due to their low start-up demand.
Low battery voltages can cause heat buildup due to increased resistance and high voltages can cause the LED to overdrive risking premature failure or dimming.
Also in the manufacturing process, there are sometimes minute variations in the chemical substrate, this can cause fluctuations in current demand.
Temperature is also a serious consideration in that it is hard to control without proper current regulation.
As current increases the temperature correspondingly rises.This can cause the voltage to rise across the junction leading once again to early failure if not properly regulated.
The industry standard for LED is around 50000hrs. As all things do they will degrade initially up to 10% over the first 1000hrs of operation followed by a slower rate of decline to 30% loss after 50000 hrs. Commercially available LEDs are generally blue LEDs with a fluorescence applied to them and its the fluorescence that degrades not the chip/diode itself.It also depends if the LEDs are being "driven" hard or voltage is variable. The types of commercial dome-type LEDs available these days are called "static sensitive" and can be badly affected by variations in voltage and current - that's why they're OK on batteries (if not run too low) but sensitive to other forms of power like 240vAC/12vAC transformers.
Based on how long a fixture is illuminated per day, here's what 100,000 works out to:
Hours of Operation: 100,000 hours is:
24 hours a day 11.4 years
18 hours per day 14.8 years
12 hours per day 22.8 years
8 hours per day 34.2 years
The life span of an LED is vastly longer than that of incandescent, fluorescent or HID lamp sources, generally lasting 50,000 hours or longer. Although the LED never really burns out, product life span is measured by lumen depreciation.
The Illuminating Engineering Society's (IES) current standard for calculating the life of an LED as the point at which the LED reaches 30 percent lumen depreciation.
Remember, a 100,000-hour rating is not equivalent to lamp life rating. LED life is rated where it has reached 30 percent lumen depreciation. At 100,000 hours an LED would still be operating, but at a decreased lumen output.
LED fixtures must be designed with junction temperature thermal management as a key component and use the correct LEDs. These products will then be robust enough to operate in most ambient temperature applications. Unlike fluorescent sources, cold temperatures do not impact the performance of LEDs.
Junction temperature is the temperature at the point where an individual diode connects to its base. Maintaining a low junction temperature increases output and slows LED lumen depreciation. Junction temperature is a key metric for evaluating an LED product's quality and ability to deliver long life.
The three things affecting junction temperature are: drive current, thermal path, and ambient temperature. In general, the higher the drive current, the greater the heat generated at the die. Heat must be moved away from the die in order to maintain expected light output, life, and color. The amount of heat that can be removed depends upon the ambient temperature and the design of the thermal path from the die to the surroundings. [Source: DOE]
The Department of Energy advises: "Heat management and an awareness of the operating environment are critical considerations to the design and application of LED luminaires for general illumination. Successful products will use superior heat sink designs to dissipate heat, and minimize junction temperature. Keeping the junction temperature as low as possible and within manufacturer specifications is necessary in order to maximize the performance potential of LEDs."
While all diodes release light, most don't do it very effectively. In an ordinary diode, the semiconductor material itself ends up absorbing a lot of the light energy. LEDs are specially constructed to release a large number of photons outward. Additionally, they are housed in a plastic bulb that concentrates the light in a particular direction. As you can see in the diagram, most of the light from the diode bounces off the sides of the bulb, traveling on through the rounded end.
The E26 is slightly smaller than the E27. It is used in Japan.
PAR is also a unit of bulb measurement. In this system of lamp identification the first number listed denotes the maximum diameter of the lamp expressed as a number of 1/8's of an inch. For example, some common sizes are:
PAR-64's (8") ;PAR-56 (7");PAR-46 (5.75");PAR-38 (4.75");PAR-36 (4.5")
All of our bulbs currently are “medium” or “Edison” base; which means they will fit into most sockets in the US.
This is a question that millions of people will be asking for the foreseeable future. The answer is Simple. LED bulbs can save you thousands of dollars on your Electric Bill. LED bulbs will help make the Planet we live, a cleaner one. LED bulbs last so long, you won't need to change them for years. Finally, The incandescent & Fluorescent bulb will be obsolete in 10 years.
No.
- 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 the year.
- The solid state technology of an LED is very durable and can withstand high levels of shock and vibration. Its able to operate in extreme temperatures cold, or hot. (-35?C to 80?C).
- LED convert almost all the energy used into the light output, making them a highly efficient light source. LED generate less than 30% of the heat of traditional lighting technologies. With minimal heat generated, LED are safe to the touch and do not produce any harmful UV rays.
- LED are environmentally friendly, they are made from non-toxic materials unlike fluorescent which contain Mercury. For more on what LED are made from.
High power LED Bulbs utilize the latest LED technology. These are the surface mount type or SMD LEDs. Small as they are, they generate high heat which must be dissipated or moved away from the LED in order for the LED to live the expected life time of 50,000 hours. To do that, most manufacturers have incorporated an aluminum body with fins to increase the total area that the heat can escape to and be dissipated. The higher the operating current, the higher the heat load to be dissipated. That means more fins, or more thin and longer fins are required. In the case of one newly developed design, the LED bulb incorporates water to assist with the dissipation of heat.
LED lighting has been around for many years and is just now really coming into its own. For years, the Light Emitting Diode was simply used as an indicator or display light in various small-scale applications. Think of those old Texas Instruments calculators, or your blinking VCR light.
LED is a solid-state technology. This means there is no glass bulb, no pressurized gases, no mercury and no burning filament. In the traditional bulb, Heat was the main result while light stood as a mere by-product of electrifying the filament.
With LED technology, what you have is a circuit board and a computer chip. The properties of the chip create light that is generated and focused through a plastic diode to create light. Depending on the chip and materials used, different colors in the color spectrum can be created. Early on the easiest color to create was red, which is why your calculator and VCR had red display lights rather than any other color. For many years, there were no advancements in LED technology and very little change in lighting technology over all; changes that did occur were mostly just plays on a theme. Metal halide, fluorescent, etc. were all just different ways to do the same thing with different effects.
In recent years, LED technology has completely changed and reinvented the light bulb and the way we think about lighting in general. This was not really possible prior to the technological revolution of the ‘90s and the rapid advancement of the microchip. The same advancements that spurred the computer to reach dizzying levels of efficiency have also done the same for the LED. Just as computers have become faster and cheaper, LED lights have become brighter, smaller, less expensive, and more sophisticated.
Yes. The E26 is the standard 120 Volt American base. The E27 is the European variant and is rated at 220 Volts. E26 is 26 mm and the E27 is 27 mm diameter. However, an E26 bulb can fit in E27 base and an E27 bulb can fit in E26 base without problem. The sockets / bulbs are interchangeable except for the voltage rating. Therefore, LED E26 bulbs that are universal line-voltage can be used in both E26 and E27 sockets.
What is IP ratings (i.e IP65, IP67, etc.?)
Please refer to
There are quite a few advantages to using LEDs. Generally they are heatless, use 90% less energy, and last ten years. They are also smaller and do not contain any dangerous chemicals like mercury. They can readily be put in places that have always been too small or out-of-the-way for many incandescent lights, as well as in places that were always very dangerous or difficult to get at. Also, the more sophisticated LED apparatuses like wall washers and spotlights are DMX-controllable, which means they can be used in some really impressive ways.
The bottom line is that LED's are easier and safer to use than all previous lighting technologies. Plus, LEDs will save you money by consuming less power, lasting much longer, and generating much less heat, which in turn combine to result in lower climate control costs.
Today there are hundreds of different products available in varying brightness levels, color temperatures, and sophistication levels to meet every lighting need – from those of an architect's latest high-rise condo project, to those of a rural homeowner's kitchen renovation. There are replacement bulbs for screw-in Edison-style bulbs and for nearly every style of Fluorescent. Plus, the LED replacements are of the “plug and play” ilk with no other modifications needed. There are also many different types of architectural lighting, such as wall washers and spotlights.
Finally, our most popular piece of LED lighting is the light bar, which can be used anywhere. From display cases to under-cabinet lighting, our light bars offer a novel (and cost-effective!) approach to accent lighting.
The most exciting product that we are currently working with is a 9 watt recessed light that many contractors are replacing all their incandescent can lights with.
In the past, we have generally referred to the brightness of a bulb in terms of its wattage, or the amount of power that the bulb uses (or energy it consumes). Because of the disparity between incandescent and LED technologies, we have to change our language a bit in order to account for progress. When referring to brightness, we now find ourselves comparing lumens (see Q: What is a lumen?). However, when comparing LEDs with incandescents, there is no easy mode of comparison because the typical incandescent is projecting light in 360 degrees – everywhere, not just where you need it. Because LED lights are directional, they focus all the light they generate exactly where you want it, and nowhere that you don't.
Another consideration is color temperature. In the past, this has been very difficult to control because you basically got whatever color your particular bulb produced. Typically this was a Warm White (about 3000K) if you had an incandescent bulb, and a Cool White (around 5000K) if you had a fluorescent bulb. Because the LED is an intelligent, solid-state technology, we are able to produce LEDs that not only produce Warm White and Cool White, but are able to produce up to 16 million different colors, each a different temperature.
EVERYONE! Architects and lighting designers are specifying entire lighting packages in their new designs. Contractors are using them in everything from custom kitchens to retail stores. Many homeowners are replacing their incandescents with LED bulbs. LED lighting can replace every instance of old lighting technology, as well create entirely new lighting applications due to its versatility. Your imagination is its only limitation.
Compact fluorescents are great bulbs, but they lack all the advantages of LEDs namely size and environmentally friendliness because they contain mercury and do not last as long.
A: Lumen is amount of light emitted from light source.
According to Wikipedia, "If a light source emits one candela of luminous intensity into a solid angle of one steradian, the total luminous flux emitted into that solid angle is one lumen. Alternatively, an isotropic one-candela light source emits a total luminous flux of exactly 4π lumens. The lumen can be thought of casually as a measure of the total amount of visible light emitted." For example, a standard 100 Watt incandescent bulb emits about 1500 lumen.
A: Lux is lumen per square meter.
According to Wikipedia, "The difference between the lux and the lumen is that the lux takes into account the area over which the luminous flux is spread. 1000 lumens, concentrated into an area of one square meter, lights up that square meter with an illuminance of 1000 lux. The same 1000 lumens, spread out over ten square meters, produces a dimmer illuminance of only 100 lux."
A: 4-channel generally means that you are able to exert a certain amount of control over the color of your light.
A: Many of our LED lighting and systems are 100-240VAC (universal voltage), so we can meet the entire worlds lighting needs during this LED revolution. We can also meet your custom needs of other voltage levels if required including up to 277V.
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