Tests conducted by the Department of Energy of the United States revealed that LED lamps with a tem

Supported by research that takes into account human factors and driven by demand in energy saving lighting for specific tasks is an essential component for the solutions of efficient and effective lighting for the workplace
The latest generation of light sources lampu led which dominates the market is LED lighting. Existing since 1960, was relatively little was promoted to commercial interiors for its energy efficiency. About a quarter inch in diameter, each diode uses about a tenth of watt to operate and can be assembled to emit light of a higher intensity. LED devices require a transformer plug or driver-typically integrators lampu led that is comparable to the fluorescent ballast equipment. LED lights are stronger and more resistant to damage than compact fluorescent and incandescent lamps. No twinkle, require low maintenance, are dimmable and, what makes them especially attractive to those seeking LEED certification have the potential to consume lampu led little power.
Today, many designers use LED lighting because they consider it more efficient in terms of energy consumption. While significant potential lampu led advantages over solid-state lighting.
The leaflets of their products, manufacturers use different evaluation criteria to compare their LED products with traditional fluorescent lighting or incandescent. Another difficulty in testing existing LED lighting is its susceptibility to change color and poor performance when subjected to high levels of heat (some manufacturers have included fans and vents to disperse heat).
After a series of pilot tests of different LED products, the United States Department of Energy released its findings in December 2006. He found that the products did not meet the specifications of the manufacturers and hinted that specifications are based on how much light an isolated LED produces and not on how much light an LED emits computer. The study concluded that "solid state lighting has the potential to emit high quality light that consumes much less energy than traditional lighting technologies, but recent tests commercially available products show that some of those sold today provide less light output than traditional light sources and are less effective than products that use fluorescent lampu led light sources. "
Tests conducted by the Department of Energy of the United States revealed that LED lamps with a temperature of 3300K are half as efficient in terms of power consumption than standard compact fluorescent (17-34 lumens / watt compared to 35-60 lumens / watt compact fluorescent). The LED lamps highest temperature used for the test (5000K) were in a more efficient way, but still placing below the efficiency of compact fluorescent lamps (CFLs).
Meanwhile, researchers are addressing the problem with the test criteria lampu led and methods of comparison. "We have developed methods and technology neutral evidence-based computers that allow teams of the same type but with different light sources to be compared properly," says Dr. N. Narendran, of the Lighting Research Center (Research Center Lighting) at Rensselaer Polytechnic Institute and research director and organizer of the Alliance for Solid-State Illumination Systems and Technologies (ASSIST; Alliance for Systems and Technologies lampu led Solid State Lighting).
Since they are closer to the work surface, positioning lights for specific tasks are considerably more efficient means to illuminate a desk suspended equipment expensive and inefficient. Can be directed to illuminate documents lampu led or move to avoid glare on the screen.
"Clearly, the most common design error is the mismatch between the place where the light and the place where people are using the light is emitted," says Hedge. "Often we light a building without knowing the final design. lampu led Even if the plane is known, things can happen that are not anticipated. For example, new tenants offices be divided differently, and the new flat can lead to a situation in which the ends will be with regard to light. Some workers may complain of brightness and headaches, while others may be in the dark, "he concludes.
In a 1990 study, researchers at Cornell were based on a survey lampu led by the American Society lampu led of In