1. The brightness of the brightness LED is different and the price is different.
Lamp cup: the general brightness is 60-70lm;
Bulb: general brightness is 80-90lm;
Note: 1W brightness is 60-110lm3W brightness up to 240lm5W-300W is integrated chip, with serial/parallel package, mainly see how much current, voltage, several strings and several.
1W red light, the brightness is generally 30-40lm; 1W green light, the brightness is generally 60-80lm; 1W yellow light, the brightness is generally 30-50lm; 1W blue light, the brightness is generally 20-30lm.
LED lens: The primary lens is generally made of PMMA, PC, optical glass, silica gel (soft silica gel, hard silica gel). The larger the angle, the higher the light efficiency. With a small angle LED lens, the light should be shot far.
2, antistatic ability <br> <br> strong antistatic ability LED, long life, and therefore higher prices. LEDs with an antistatic greater than 700V are usually used for LED lighting.
3 the same, the wavelength of the LED <br> <br> wavelength, and color, the same color as required, the price is high. It is difficult for manufacturers without LED spectrophotometers to produce pure color products.
White light is divided into warm colors (color temperature 2700-4000K), white (color temperature 5500-6000K), cool white (color temperature 7000K or more) Europeans prefer warm white.
Red light: band 600-680, of which 620, 630 is mainly used for stage lights, 690 is close to infrared;
Blu-ray: Band 430-480, of which 460,465 stage lights are used more;
Green light: Band 500-580, of which 525, 530 stage lights are used more.
4. Leakage current LED is a unidirectional conductive illuminator. If there is reverse current, it is called leakage, and LED with large leakage current has short life and low price.
5, different emission angles <br> <br> LED uses different light emitting angles. Special lighting angle, the price is higher.
6, different quality of life <br> <br> is critical, life determined by the light fades. Low light decay, long life, long life and high price.
7, LED chip LED illuminator is a chip, different chips, the price difference is very large. The chips in Japan and the United States are more expensive, and the LED chips of Taiwanese and Chinese manufacturers are lower than Japan and the United States.
8, the chip size of the chip size <br> <br> side length indicates the chip size is generally:
38-45mΩ, the quality of large chip LEDs is better than small chips. The price is proportional to the chip size.
9, colloidal <br> <br> ordinary LED colloidal generally epoxy resin, plus a UV LED and fire agents more expensive, high quality outdoor LED lighting should be UV and fire.
10, the color values of white <br> <br>: 60-65, warm white: 50-60, since the different phosphor packaging companies use different, so the color values are not the same.
Electric light design skills <br> <br> each product will have different designs, different designs for different uses, LED lighting design reliability include: electrical safety, fire safety, for the environment safety, mechanical safety , health and safety, safe use of time and other factors. From the perspective of electrical safety, it should comply with relevant international and national standards. Since LED is a new product, China's national standard lags behind, but the country provides product qualification testing. LED lighting with international safety certification (such as GS, CE, UL, etc.) and national product quality certificate is expensive, because these products are reliable in safety design. Consumers are paying attention to the authenticity of the certificate. There are not many manufacturers with international safety certification and national product certification.
From the aspect of health, the price of products designed with non-toxic materials is high, especially for indoor LED lighting. Don't use cheap LED lighting with odor. At present, only a few LED manufacturers use non-toxic materials to produce, discerning methods. You can use your nose directly, and the smelly products are much cheaper than the odorless ones. Toxins like lead, mercury, and cadmium require professional analysis.
From the perspective of applicable environmental safety, there is a reliable dust-proof and moisture-proof design, and the price of LED products with fireproofing, ultraviolet protection and low-temperature cracking is high. The technical parameters of LED mainly include luminous intensity, chromaticity, wavelength, color temperature and so on. Below we give a brief introduction to these parameters.
Luminous Intensity (IV)
Light intensity is defined as the luminous flux emitted by a unit solid angle in units of candle light (Candela, cd). In general, the light source emits its luminous flux at different intensities in different directions, and the visible light radiation intensity emitted by the solid angle in a specific direction is called the light intensity.
Chromaticity
The perception of color by the human eye is an intricate process. In order to quantify the description of color, the International Lighting Association (CIE) uses the visual experiment of standard observers to visualize the human eye's visual sensation caused by different wavelengths of radiant energy. Record, calculate the color matching function of the three primary colors of red, green and blue. After mathematical conversion, the so-called CIE1931 Color Matching Function (x((), y((), z(()))), according to this color matching function, Subsequent development of several color metric definitions allows people to describe the color. According to the CIE1931 color matching function, the human eye's stimulus value for visible light is expressed as XYZ, and the x, y value is obtained by the following formula, ie CIE1931 (x, y) Chromaticity coordinates, through which the description of color is quantified and controlled.
x,y: CIE1931 Chromaticity Coordinates
However, since the color gamut constructed by the (x, y) chromaticity coordinates is non-uniform, making the chromatic aberration difficult to quantify, CIE converted the CIE1931 chromaticity coordinates in 1976, so that the color gamut formed is close. Uniform chromaticity space, which allows the color difference to be quantified, ie CIE1976UCS (Uniform Chromaticity Scale)
The chromaticity coordinate, expressed as (u', v'), is calculated as follows: The dominant wavelength (λD) is also one of the methods for expressing color, after obtaining the chromaticity coordinates (x, y) of the device to be tested. , mark it on the CIE chromaticity coordinate map (as shown below), connect the E source chromaticity point (chromaticity coordinates (x, y) = (0.333, 0.333)) and the point and extend the connecting line, the extension line The wavelength value that intersects the spectral trajectory (horseshoe shape) is called the dominant wavelength of the device under test.
It should be noted that the same dominant wavelength will represent multiple different chromaticity points under this marking method, which is more meaningful when the chromaticity point of the device to be tested is adjacent to the spectral trajectory, while white LEDs cannot be used in this way. Describe its color characteristics.
Purity
It is an auxiliary representation when the color is described by the dominant wavelength, and is defined as a linear distance between the chromaticity coordinates of the test object and the chromaticity coordinate of the E light source and the spectral trajectory of the E light source to the dominant wavelength of the test object.
Lamp cup: the general brightness is 60-70lm;
Bulb: general brightness is 80-90lm;
Note: 1W brightness is 60-110lm3W brightness up to 240lm5W-300W is integrated chip, with serial/parallel package, mainly see how much current, voltage, several strings and several.
1W red light, the brightness is generally 30-40lm; 1W green light, the brightness is generally 60-80lm; 1W yellow light, the brightness is generally 30-50lm; 1W blue light, the brightness is generally 20-30lm.
LED lens: The primary lens is generally made of PMMA, PC, optical glass, silica gel (soft silica gel, hard silica gel). The larger the angle, the higher the light efficiency. With a small angle LED lens, the light should be shot far.
2, antistatic ability <br> <br> strong antistatic ability LED, long life, and therefore higher prices. LEDs with an antistatic greater than 700V are usually used for LED lighting.
3 the same, the wavelength of the LED <br> <br> wavelength, and color, the same color as required, the price is high. It is difficult for manufacturers without LED spectrophotometers to produce pure color products.
White light is divided into warm colors (color temperature 2700-4000K), white (color temperature 5500-6000K), cool white (color temperature 7000K or more) Europeans prefer warm white.
Red light: band 600-680, of which 620, 630 is mainly used for stage lights, 690 is close to infrared;
Blu-ray: Band 430-480, of which 460,465 stage lights are used more;
Green light: Band 500-580, of which 525, 530 stage lights are used more.
4. Leakage current LED is a unidirectional conductive illuminator. If there is reverse current, it is called leakage, and LED with large leakage current has short life and low price.
5, different emission angles <br> <br> LED uses different light emitting angles. Special lighting angle, the price is higher.
6, different quality of life <br> <br> is critical, life determined by the light fades. Low light decay, long life, long life and high price.
7, LED chip LED illuminator is a chip, different chips, the price difference is very large. The chips in Japan and the United States are more expensive, and the LED chips of Taiwanese and Chinese manufacturers are lower than Japan and the United States.
8, the chip size of the chip size <br> <br> side length indicates the chip size is generally:
38-45mΩ, the quality of large chip LEDs is better than small chips. The price is proportional to the chip size.
9, colloidal <br> <br> ordinary LED colloidal generally epoxy resin, plus a UV LED and fire agents more expensive, high quality outdoor LED lighting should be UV and fire.
10, the color values of white <br> <br>: 60-65, warm white: 50-60, since the different phosphor packaging companies use different, so the color values are not the same.
Electric light design skills <br> <br> each product will have different designs, different designs for different uses, LED lighting design reliability include: electrical safety, fire safety, for the environment safety, mechanical safety , health and safety, safe use of time and other factors. From the perspective of electrical safety, it should comply with relevant international and national standards. Since LED is a new product, China's national standard lags behind, but the country provides product qualification testing. LED lighting with international safety certification (such as GS, CE, UL, etc.) and national product quality certificate is expensive, because these products are reliable in safety design. Consumers are paying attention to the authenticity of the certificate. There are not many manufacturers with international safety certification and national product certification.
From the aspect of health, the price of products designed with non-toxic materials is high, especially for indoor LED lighting. Don't use cheap LED lighting with odor. At present, only a few LED manufacturers use non-toxic materials to produce, discerning methods. You can use your nose directly, and the smelly products are much cheaper than the odorless ones. Toxins like lead, mercury, and cadmium require professional analysis.
From the perspective of applicable environmental safety, there is a reliable dust-proof and moisture-proof design, and the price of LED products with fireproofing, ultraviolet protection and low-temperature cracking is high. The technical parameters of LED mainly include luminous intensity, chromaticity, wavelength, color temperature and so on. Below we give a brief introduction to these parameters.
Luminous Intensity (IV)
Light intensity is defined as the luminous flux emitted by a unit solid angle in units of candle light (Candela, cd). In general, the light source emits its luminous flux at different intensities in different directions, and the visible light radiation intensity emitted by the solid angle in a specific direction is called the light intensity.
Chromaticity
The perception of color by the human eye is an intricate process. In order to quantify the description of color, the International Lighting Association (CIE) uses the visual experiment of standard observers to visualize the human eye's visual sensation caused by different wavelengths of radiant energy. Record, calculate the color matching function of the three primary colors of red, green and blue. After mathematical conversion, the so-called CIE1931 Color Matching Function (x((), y((), z(()))), according to this color matching function, Subsequent development of several color metric definitions allows people to describe the color. According to the CIE1931 color matching function, the human eye's stimulus value for visible light is expressed as XYZ, and the x, y value is obtained by the following formula, ie CIE1931 (x, y) Chromaticity coordinates, through which the description of color is quantified and controlled.
x,y: CIE1931 Chromaticity Coordinates
However, since the color gamut constructed by the (x, y) chromaticity coordinates is non-uniform, making the chromatic aberration difficult to quantify, CIE converted the CIE1931 chromaticity coordinates in 1976, so that the color gamut formed is close. Uniform chromaticity space, which allows the color difference to be quantified, ie CIE1976UCS (Uniform Chromaticity Scale)
The chromaticity coordinate, expressed as (u', v'), is calculated as follows: The dominant wavelength (λD) is also one of the methods for expressing color, after obtaining the chromaticity coordinates (x, y) of the device to be tested. , mark it on the CIE chromaticity coordinate map (as shown below), connect the E source chromaticity point (chromaticity coordinates (x, y) = (0.333, 0.333)) and the point and extend the connecting line, the extension line The wavelength value that intersects the spectral trajectory (horseshoe shape) is called the dominant wavelength of the device under test.
It should be noted that the same dominant wavelength will represent multiple different chromaticity points under this marking method, which is more meaningful when the chromaticity point of the device to be tested is adjacent to the spectral trajectory, while white LEDs cannot be used in this way. Describe its color characteristics.
Purity
It is an auxiliary representation when the color is described by the dominant wavelength, and is defined as a linear distance between the chromaticity coordinates of the test object and the chromaticity coordinate of the E light source and the spectral trajectory of the E light source to the dominant wavelength of the test object.
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