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The Important Specifications Of LED Light
Aug 18, 2017

(1) LED color: It is a very important indicator, and every LED-related lighting products must be marked it, the current color of the main LED red, green, blue, blue, yellow, white, warm white, Amber and so on.

(2) LED current: LED positive limit (IF) current more than 20MA, and LED light fading current can not be greater than IF / 3, about 15MA and 18MA. LED luminous intensity is only within a certain range and IF is proportional to, when IF> 20MA, the brightness of the enhancement has been unable to use the eye points out. Therefore, the LED current is generally selected in the 17-19MA is more reasonable. 

(3) LED voltage: It means the forward voltage, For example, the positive pole of the LED power supply positive, negative connected to the negative power supply. Voltage and color are related, red, yellow, yellow and green voltage is between 1.8-2.4v. White, blue, green voltage is between 3.0-3.6v, where I would like to remind is that the same batch of LED voltage will have some differences, according to the manufacturers to provide the prevail, the external temperature rise, VF will drop.

(4) LED reverse voltage VRm: It means LED allowed the maximum reverse voltage. Exceeding the value, the light emitting diode may be damaged by breakdown.

(5) LED color temperature: the absolute temperature K to that is about a standard black body heating, the temperature rose to a certain extent, the color began by the crimson - light red - orange - white - blue, gradually change, a light source and the black body When the colors are the same, the absolute temperature at the time of the blackbody is called the color temperature of the light source.

(6) luminous intensity (I, Intensity): unit candela, is cd. The luminous flux emitted by the light source in the unit solid angle in a given direction is defined as the light intensity (intensity) of the light source in this direction, the luminous intensity is for point light sources, or the size of the luminous body is compared with the irradiation distance Small occasions. This amount is indicative of the ability of the luminous body to emit in space. It can be said that the luminous intensity is to describe the light source in the end how "bright", because it is a combination of optical power and convergence capacity of a common description. The greater the luminous intensity, the brighter the light source looks, and the more light the object is illuminated by the light source under the same conditions, so the earlier description of the flashlight uses this parameter.

(7) LED luminous flux (F, Flux): unit lumens, that is lm. The amount of light emitted by the light source in a unit time is called the luminous flux of the light source. Similarly, this amount is for the light source, is to describe the size of the total light source, and optical power equivalent. The greater the luminous flux of the light source, the more light is emitted.

(8) LED light intensity (E, Illuminance): unit lx (formerly called lux).It means that 1 lumen luminous flux is evenly distributed over 1 square meter of the surface produced by the light intensity.

(9) color rendering: When the light source lighted the object itself, it dispalyed the color is called color rendering or the degree of color fidelity; light source color rendering is indicated by the color rendering index, which indicates the object in the light color ratio Light (sunlight) when the color deviation of the light, can more fully reflect the color characteristics of the light source. High color rendering of the light on the color performance is better, we see the color is close to the natural color, low color of the light source of poor performance, we see the color deviation is also larger.International Lighting Commission CIE to the sun's color rendering index as 100, all kinds of light source color rendering index is different.

(10) glare: the field of view of a very high brightness objects or a strong contrast, you can cause visual discomfort known as glare, glare is an important factor affecting the quality of lighting.

(11) LED lifespan: In generally, LED can be used for more than 50,000 hours,  The main problem in this regard is that the LED is not simply no longer operate it, its rated life can not be used to measure the traditional lamp to calculate. In fact, when testing the LED life, no one will stay next to waiting for it to stop working. However, there are other ways to calculate the LED life. The reason why LED is durable, because it does not produce filament fusing problems. LED will not stop directly, but it will gradually degrade over time.

There are predictions that high-quality LEDs, after 50,000 hours of continuous operation, can maintain more than 60% of the initial brightness. why LED is durable? because it does not produce filament fusing problems. LED will not stop directly, but it will gradually degrade over time.

(12) Beam angle: the diode angle of light is its light scattering angle, mainly by the diode production with scatter to control.

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