Standard for Blu-ray
In the European Union, IEC 62471: 2006 & EN62471: 2008, which covers the CE Low Voltage Directive 2006/95 / EC, was implemented in 2009.09.01, which fully replaced the IEC / EN60825 standard for LED product energy Grade requirements, including the radiation intensity, radiation brightness, etc., and according to the test data on the product hazard classification, including the exemption level, low risk, medium damage, high hazard level. For all LED lights are required in accordance with IEC / EN62471 light biosafety standards for risk rating assessment, and retinal blue light hazards and retinal blue light hazards (small light source) for the test object. The following is the blue light hazards arising from the exposure time and emission limits required:
In addition, the use of the retinal blue light hazard (Retinal blue light hazard), the new version of the general standard lamps "lamps and lanterns in general requirements and test _ Part 1" IEC60598-1: 2014 introduced IEC / tr 62778: 2012 "light and lighting light biosafety Blu-ray damage assessment application ", specifically for the retinal blue light hazards were as follows:
1) LED light source lamps of category 0 danger (RG0) and Class 1 hazard (RG1) are not applicable when tested in accordance with IEC / tr 62778 at 200 mm distance;
2) Moving lamps and hand-held lamps beyond Class 1 hazard (RG1) need to be marked "Do not stare at light source"
3) children's lights and night light Blu-ray hazards can not exceed Category 1 risk (RG1), to determine whether the product is RG0 or RG1 is the test distance is 20 cm.
Summary: Easy to understand RG0 (Blu-ray exemption level) can be used for indoor lighting products, including children's lamps, RG1-level products must have "Do not stare at light source can not watch the light source" logo. In other words you buy regular manufacturers of home lighting products are usually RG0 level of products, Blu-ray is controlled in a certain range, will not cause harm to the eyes.
Recommended to buy through the national quality certification of the brand, the domestic can be assured to buy a Foshan lighting, the United States, Op, NVC and other brands, international brands are Philips, Panasonic and so on. Their blue light control is mainly reflected in the use of LED products meet the RG0 level, each supply LED chip manufacturers as long as the product RG0 certification, the blue value is almost the same. Zandai not recommended to buy, the use of the chip can not guarantee.
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The effect of color temperature on blue light
The 2014 Nobel Prize in Physics awarded the Japanese scientist, Isamu Akasaki, HiroshiAmano, and ShujiNakamura, a Japanese-American scientist at the University of California, Santa Barbara, in recognition of their invention. New energy-efficient light source contribution, that is, blue light-emitting diode (LED), for energy savings to open up new space.
Blu-ray, illuminated the world, the appearance of the official blue light to make LED white light! That is, white light is inseparable from the blue light.
Home lighting LED color temperature mainly in the 3000K to 6500K between. 3000K is yellow, 6500K is white, usually 4000K to 5000K for the neutral light.
To a domestic eye lamp, for example, the lamp has 3000K, 4000K, 6000K third gear color temperature.
3000K color temperature blue light value is relatively low; 6000K when the highest value of blue; as 4000K color temperature is 3000K and 6000K two color temperature lamp beads mixed shiny, not the use of 4000K color temperature wick, so the test results close to 6000K blue results. In fact, alone use 4000K color temperature wick, blue light value will be between 3000K and 6000K. Summary: Blu-ray depends on the level of color temperature. Ambient lighting is recommended to use a color temperature of 5000K.
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About continuous spectra
Needless to say, it is not continuous spectrum, technical restrictions. But did not find anyone who saw LED TV and look at the phone to look blindly
Of course, the higher the better color, color difference will be how the LED? My friend gave me a photo, a family shot under the lights, all into the Avatar. Of course this may be caused by the white balance of the camera, but this is caused by a white balance error caused by the light.
How to determine whether the color of the lamp is high or low?
The higher the color, the lower the luminous flux value, in other words, the use of luminous flux in exchange for color improvement. Color is greater than 80, be a good light.