“L-E-D”. When it comes to lighting, you’re hearing these three letters again and again… you view it posted around lighting websites, and its own needs to bug you. It seems to be a thrilling new trend…some type of new innovative light…but you have no idea what it is. You would like to know very well what everybody’s talking about- what’s all the rage?
LED’s – LEDS – To put it simply, LED’s are diodes that…(huh?) hang on, I’ll explain: a diode may be the simplest type of semiconductor device. (what’s that?) wow, you’re impatient: A semi-conductor is a material with the ability to conduct electrical current. Basically, instead of emitting light from a vacuum (as within an incandescent bulb) or a gas (as in a CFL), LED emits light from a piece of solid matter, its semi-conductor. Stated very simply, an LED produces light when electrons move around within its semiconductor structure.
They tell you when to stop and go. They have ruled your driving, saved your life countless times, and that little red man made you hold out till you were able to cross the street. That is right – the red, yellow and green on the traffic lights are Led lights right in front of your nose. Actually, Light Emitting Diodes have been around for quite a while, conceptualized in 1907. However, it wasn’t until the 1960s that practical applications were found and LED’s were first manufactured. LED was previously used exclusively for traffic signals, brake lights and headlights on luxury cars, and indicator lights on appliances.
You probably didn’t even know that LED lights were smoking cigarettes your digital clocks, flashlights and letting you know when you’ve got a fresh voice message on your own cell phone. magnetic track light price in the beginning, as applications grew, benefits were discovered and manufacturing costs went down. In line with the American Lighting Association (ALA), lighting manufacturers have invested time and effort, effort and research into adapting this super energy-efficient technology for household use. The technology has advanced enough to win approval from the government’s popular and well-respected Energy Starï¿½ program. So here’s why:
They do more for less. LED’s are efficient-producing lots of light from a little power. For example, one 5-watt LED can produce more light (measured in lumens) than one standard 75-watt incandescent bulb. The 5-watt LED could do the job of the 75-watt incandescent at 1/15 of the power consumption. LED’s save energy and, therefore, money. This is because in LED lights, 90% of energy is converted into light, while in incandescent bulbs 90% of energy would go to heat and only 10% to visible light.
They go longer. LED is virtually free of maintenance – they don’t have a filament which will burn out, so that they last much longer. A typical “long life” household bulb will burn for approximately 2,000 hours. An LED might have a useful lifespan up to 100,000 hours! By some sources, LED’s can last so long as 40 years. Imagine not having to change a light bulb for years. There are LED products available this season which will make frequent lamp changes so 20th century.
How it actually works… (skip this part unless you really care) Light is a form of energy which can be released by an atom. It is made up of many small particle-like packets, called photons, which are the most elementary units of light. LED’s are specially constructed release a a lot of photons outward.When a power charge strikes the semiconductor, a little electrical current, which is measured by watts (oh! so that’s what they mean by ‘has low wattage’!) is passed through the semiconductor material. this causes the electrons to move around, become “excited” and give off photons. Almost all of the power emitted is light energy.
In an ordinary diode, such as for example incandescent bulbs, the semiconductor material itself ends up absorbing a lot of the light energy so that it produces more heat energy than light energy.That is completely wasted energy, unless you’re utilizing the lamp as a heater, just because a huge portion of the available electricity isn’t going toward producing visible light. LED’s generate very little heat, relatively speaking. A much higher percentage of the electrical power is going right to generating light, which cuts down on the electricity demands considerably. As you can plainly see in the diagram,they’re housed in a plastic bulb that concentrates the light in a specific direction. Almost all of the light from the diode bounces off the sides of the bulb, traveling on through the rounded end.
They are a better buy (in the long term). Up until recently, LED’s were very costly to use for some lighting applications because they’re built around advanced semiconductor material. The cost of semiconductor devices has plummeted over the past decade, however, making LED’s a more cost-effective lighting option for a variety of situations. While they might be more expensive than incandescent lights in advance, a 60-watt LED replacement bulb runs in your community of $100, and even the lower-output versions, useful for things such as spot lighting, will cost between $40 and $80.
That’s compared to a $1 incandescent and a $2 fluorescent bulb.The reality is, even at $100 for a single bulb, LEDs will end up saving money in the end, because you only need a couple of every decade and you also spend less money on home lighting, which can take into account about 7 percent of your electric bill [source: Greener Choices]. But don’t worry, the scary price you need to pay upfront won’t last too much time, the lighting industry generally expects LED costs to come down quickly. Lighting Science Group, a company that develops and manufactures LED lighting, estimates a 50 percent price reduction within two years.