Marisol Mac. Lighting. July 19th , 2017.
Many salespeople in marketing LED for some reason may give customers to provide some fuzzy information, resulting in misleading, such as LED life of about 100,000 hours, where the 100,000 hours is the manufacturer expected LED life. As the light source of the light, the brightness of the lamp has a process of gradual decay and darkening (such as fluorescent lamps) , Energy-saving lamps), this process referred to as light failure. In the application-level LED, the light failure of more than 50%, the human eye can clearly feel the brightness of the change, then the product brightness we think is not suitable for lighting. Many manufacturers and engineers in the use of low-cost LED three months to six months or so, often found that the brightness of LED is not as bright as the installation of light, or even almost no, it is because the LED lamp failure did not take into account the reasons. In summary, we have to pay attention to the purchase of LED light decay of its speed, rather than the use of time.
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Consider the height of the light. When placed above a table or counter, it should be at least 30" above the surface. Else, it should end at 7' from the floor. When placing for decorative purposes, as long as it does not impede movement, the height of the light can be anything you wish it to be.
LED lightingmanufacturers expect LED life to reach 100,000 hours MTBF (The average time between failures, the standard used by traditional lighting manufacturers to measure the life of the light source). But, like all basic light sources, like LED The luminous flux also fades with time. So although the LED light-emitting time can be very long, MTBF is not the only consideration to determine the service life. The attenuation of LED lumens is affected by many environmental conditions such as ambient temperature, humidity and ventilation. Lumen fading is also affected by control, thermal management, current levels and many other electrical design considerations (cited above for US CK).
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