How to choose LED light

How to choose LED light

LEDs will surely become the fourth generation illumination, the momentum of its development increasingly vigorous, its main advantages are: energy saving, long life, no flicker that does not complicate the eyes, does not attract mosquitoes. High-powered LED lights provided that the thermal design is good enough, 3-5 million hours of life does not matter (life is defined as: LEDs because this is a semiconductor component, the chips that are exposed to temperature will cause minor damage, When luminous flux LEDs due to light attenuation less than 30% from the initial luminous flux, the basic LED illumination does not have the lighting significance, that is the summary of life, although LED lights can still be lit now, but the brightness has fallen. How to choose LED light
You say the LED lights coming out of the object will be painted in color, because the spectrum is missing the color, that’s the wrong idea. The reason is very simple, color TV (CRT) not only three primary colors (red, green, blue) are mixed to get various colors. Lighting is the use of more high-powered white LEDs, especially the exposures of blue-chip excitation of mixed white phosphorus. I want you to say that the object will be exposed to color, mainly due to two factors:

1. The LED color rendering index used is too low, causing the emitted light not to reflect the true color of the object. (Light source on the color rendering capacity of objects known as color, rendering Ra color index up to 100, best color) LED color rendering index is currently 80-85, then, very good, useable indoor lighting. How to choose LED light

2. LED color temperature used is not good, simple understanding can be considered light color. The color temperature is low, then the light will come out from the partial red green, too high will be blue, not suitable for indoor lighting. So indoor lighting at LED light temperature is a very important parameter. LEDs generally set color temperature at 2700K-4000K for a warm, 4000K-5000K for natural white, 5000K-6700K for a warm white and white white natural temperature will give warm and warm impression, suitable for use in hotels, hotels. , and the bedroom. While the white one is giving people a cool cool feeling, for the office, more room lighting (fluorescent lights are generally more than this color temperature).

Brightness is equivalent to 100W energy saving lamp, it depends on the light effect of the used LED lights (lumens / watt, lm / w), the same wattage, the higher the efficiency of the luminous LED light, the higher the brightness. The general LED lighting efficiency is 70lm / w, provided there is 50-60W will be capable of more than 100W energy-saving lamps.

Another room lighting I really have never seen a 100W energy saving lamp, at least our company does not produce more than 60W indoor LED, Finally say is buy LED lights to pay attention to light effects, color temperature, color rendering. index, light failure The first three are the general parameters of all LED lights, the last lamp failure is the LED as the unique property of the semiconductor.

Also in the choice of LED lights if some people have the following error!

Misunderstanding 1, the true life expectancy is too high.

LED manufacturers expect live LEDs to reach 100,000 hours of MTBF (average time between failures, standards used by traditional lighting manufacturers to measure the lifetime of light sources). But, like all basic light sources, such as the luminous Flux LED also fades as time passes. So even though the time of the LED light transmitter can be very long, MTBF is not the only consideration to determine the service life. The attenuation of the LED lumens is influenced by many environmental conditions such as ambient temperature, humidity and ventilation. Lumen fading is also influenced by control, thermal management, current levels and many other electrical design considerations (quoted above for CK US).

Many salespeople in LED marketing for some reason can give customers some information that is blurry, so misleading, as the LED lifespan is around 100,000 hours, of which 100,000 hours are manufacturers expecting LED life. As a light source, the brightness of the lamp has a gradual decay process and embezzlement (such as fluorescent lamps), energy saving lamps), this process is called a mild failure. In the LED application level, light failure more than 50%, the human eye can clearly feel the brightness of the change, then the brightness of the product that we think is not suitable for lighting. Many manufacturers and engineers who use low-cost LEDs three months to six months or more often find that LED brightness is not as bright as light installations, or even hardly, because the lamp How to choose LED light