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Archive for April, 2011

LED light bulbs

23 Apr

The green revolution in lighting is not without its casualties. While many consumers have switched from traditional filament light bulbs to compact fluorescent light bulbs, in the process they have lost the ability to utilize dimming switches in their homes. Thankfully a new form of energy-efficient light bulbs have arrived that provide this desired feature.

Compact fluorescent lights have solved many of the problems associated with traditional filament light bulbs. Traditional light bulbs utilize a very small amount of the energy they utilize to produce light- the majority of the energy fed into traditional light bulbs is expressed primarily as heat- which is why traditional light bulbs get so hot so quickly when they are switched on. Compact fluorescent light bulbs convert a considerably higher percentage of their energy into light, which is why they are significantly more energy efficient than traditional filament bulbs.

This boost in energy efficiency isn’t without its drawbacks, and one of the biggest is the fact that compact fluorescent light bulbs are unable to dim. Compact fluorescent light bulbs are either switched on or they are switched off, there is no middle ground where they produce a percentage of their potential light. Because dimmable lights and dimmer switches are so popular amongst American consumers, this drawback has been a significant one. A large amount of consumers desire to use energy efficient lights, both to lower their energy bill and to help protect the environment, but are unwilling to lose the dimmable lighting systems they treasure. Up until recently these consumers were caught in quite a bind.

But with the introduction of the dimmable led bulbs for replacements this problem has been solved. Like compact fluorescent light bulbs LED based light bulbs are far more energy efficient than traditional filament light bulbs. “Unlike compact fluorescent light bulbs, LED based light bulbs provide a variety of lighting options- including the ability to provide a wide range of light, which allows them to act as a proper replacement light bulb for traditional filament light bulbs that were used in dimmable lighting systems.” said Ming Lin, Senior Engineer of Global Green Lighting, Inc.

In many ways LED lights provide the best of both worlds. They are extremely energy efficient and environmentally friendly (and are, in fact, more environmentally friendly than compact fluorescent bulbs as they contain no dangerous gas) while providing exceptional brightness and total control over the light that they produce. “Our dimmable led lamps can easily replace a traditional filament bulb of about 60 to 70 watts while saving money and environmental impact without losing any of the traditional bulb’s functionality.” add Ming Lin, Senior Engineer of Global Green Lighting, Inc.

It should come as no surprise then that more and more American consumers are opting to switch over from traditional filament bulbs and new compact fluorescent bulbs in exchange for high-tech dimmable led lights. While most people originally believed that LED lights were only appropriate for retail or night life applications, every day more and more American consumers are seeing that LED lights provide the earth-friendly retrofit lighting alternative that they’ve been searching for.

 

Household And Outdoor Led Lights

23 Apr

There was a time when human beings used to get up early in the morning, worked all day and all the activities used to be stopped as the sun sank down the horizon. Human beings used to utilize the sunlight as much as possible. But the situation is different now; to keep pace with today’s dynamic lifestyle, you have to stay active day and night.

Artificial illuminants are the only source of light in night; but what kind of light can be used? It is our responsibility to optimize natural resource usage; power consumption should be optimized in best possible way. That is why LED lights are important.

LED stands for Light Emitting Diode; LED light bulbs and tubes are much more energy efficient than traditional incandescent bulbs. You can get same illumination with LED bulbs by consuming much less amount of power in comparison with incandescent bulbs and CFLs.

You may ask that if LED light bulbs are so good, why they took so time to make it to the mainstream lighting market? Cost is the answer in one word. The cost of semiconductor came down in the international market recently and the LED lights became affordable.

If you have 10 light bulbs in your home and you switch over to LED, you can save huge amount of money on your utility bills. The initial installation charge may be high as you need to buy 10 LED bulbs together, but the process will bring you huge profit in the long run.

LED lights for your Home and Outdoor

Different types of decorative LED lights are available in the market; you can choose a light bulb that looks good for the interior of your home. Along with saving money and power, you can upgrade your interior as well.

LED lights are good for outdoor too. Garden, garage, parking lot, walkway, street lights – you will get LED bulbs and tubes for all purposes. Some of the cities have started using LED to light up their streets; this will help the cities save a lot of money in the long run.

To make the process simpler, easier and affordable, a lot of LED stores are offering their products online at discounted rates. You can purchase LED bulbs and tubes at much lower rates than market. Just log on to the internet and search for LED lights; choose attractive bulbs and tubes from the online stores.

 

Green Goes Bad: LED Traffic Lights Can’t Melt Snow, Cause Accidents

21 Apr

New-fangled LED traffic lights last longer, pierce the darkness more effectively and consume 90% less energy than incandescent bulbs. That’s also their drawback. They’re not hot enough to melt snow that sticks to their lenses, causing dozens of accidents.

LED’s are, by design, more thermally efficient than incandescent bulbs, meaning more of the electricity is turned into light and less into heat. Incandescent bulbs are generally considered to “waste” electricity as a result of this thermal inefficiency, but in the case of traffic lights in northern climes there’s a happy benefit, the “waste” heat melts snow so, you know, people can see the lights.

Police departments across the northern United States are noticing an uptick in accidents related to snow-packed LED traffic signals. Whereas incandescent bulbs melt the snow, the LED units cannot and the snow blocks all the light. The problem happens during heavy, wet snows with high cross winds, and can persist as long as the temperature hasn’t raised to naturally melt the snow (or road crews clean the lights by hand).

Why motorists are dumb enough to take this as an indication to just barrel through an intersection into an accident is beyond us. We’d think they’d be smart enough to simply treat the situation the same as a power outage, approaching the intersection as a four-way stop. Although there’s no solution to the problem, although it seems a gentle heating element attached to a nifty sensor would do the job — but such a device would certainly cut into the energy savings benefit from LED signals (sorry Greenies, better luck next time!). Another option? Motorists practicing defensive driving. Yeah, like that’ll happen.

 

LED Chandelier Bulbs Make Royal Impression at the Palace

21 Apr

In an effort to reduce energy consumption and maintenance costs, the Royal Household in Buckingham Palace, London, has installed an LED chandelier and other LED lighting effects.

Bespoke Lighting, a UK-based company that recently merged with LED lighting specialist LEDtronics, Inc. has undertaken two projects to introduce LED lighting into Buckingham Palace. The exterior of the Palace was also lit with LEDs last year.

Bespoke and LEDtronics developed a unique method of illuminating chandeliers using LEDs. The project was undertaken at the request of The Royal Household, in an effort to reduce energy consumption and maintenance costs. The center room chandelier was nominated and all 32 twenty-five watt tungsten lamps were removed, and a low-voltage system controlling 2.8 watt LED lamps.

Energy savings in excess of 80% were realized, and the next re-lamping will not need to be scheduled until 2020. The next chandelier to be converted will be fitted with a warmer version of LED lamps, perfectly recreating the color temperature of tungsten lamps.

“The aesthetics of the respective rooms is a major consideration and consequently we needed an option on the color of the lamps. Bespoke lighting and LEDtronics have succeeded in providing the perfect solution for The Royal Household .and their energy saving strategy has been greatly enhanced”, said Pervaiz Lodhie, president and founder of LEDtronics and co-owner of Bespoke Lighting International.

“We are now perfecting an LED candle lamp for The Palace that will again assist them in their commitment to saving energy”.

Lodhie says that LEDtronics also recently worked jointly with Bespoke in illuminating the Grand Staircase in Buckingham Palace. “We installed around 32,000 LEDs, which included a combination of warm-white combined with red, green and blue, giving a range of several thousand color temperatures. The system is controlled remotely by radio transmitter.”

 

LED Backlight Versus Traditional LCD Backlight

12 Apr

Have you ever looked at the back of your LCD high definition television and wondered why there is a whole lot of light coming out of the ventilation slits?  Well, there’s a reason for it, and someday it might be a whole lot more colorful.

While there are fans of both LCD (Liquid Crystal Display) and plasma HD TVs, one thing the latter has over the former is that the technology does not require any form of backlighting.  An LCD screen does not actually emit any light of its own, so for it to show the images on the screen properly, it needs to be backlit from some type of lighting source.  Currently the most common form of lighting in these television sets is Cold-Cathode Fluorescent Lamps (CCFL) that are laid horizontally running up the height of the screen.  However, if you are willing to shell out the extra money, you could go with an LCD TV that is running LEDs (light-emitting diodes), which are more than likely the wave of the future.

samsung-ledIgnoring the extra cost of the LEDs, there are even more choices you have to make once you decide that you want to go this route.  From the outside the TVs look no different (that is a Samsung LED set to the right), but on the inside you have at least two decisions to make about if you want the LEDs to be edge-mounted or direct.

As the name “edge-mounted” implies, the lights run along the exterior frame of the screen which allows them to be mounted in extra thin sets.  The issues are that if the light is not properly distributed you can end up with some shadowed areas, and you also lose some contrast because they are always on.

Direct LEDs are mounted in strips behind the screen and can be turned off in the darker areas of an image so that you get much better contrast in your picture.

The other debate with LEDs is whether you should be using white or RGB (Red Green Blue).  White is similar to the current CCFL set up, but RGB offers you a broader spectrum of color.  This will probably be decided for you by the manufacturers, but still handy to know about it.

In short, if you want the best LCD, you probably want direct RGB lighting for your set, but you also need to expect to pay quite a bit more at this time for the technology.  Eventually the price will drop and we will probably see all LCDs go this route, but it may be another year or two before it becomes mainstream technology.

 
 
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