The technical requirements of LED lighting in industrial and civil applications

LED lamps are the starting point for fast, excellent toning properties, high luminous efficiency, long life advantages of energy saving, environmental protection, light, very promising. But after all, still in the development stage, there are a lot of good to solve problems. Such as poor color quality, big glare, lighting package has yet to be developed, power harmonics, power factor to take into account also less use of coefficient calculations almost no market mixed products. Therefore, the LED and put forward a number of technical requirements is essential, which will help to improve production quality and technical level LED lights, will help improve the quality of lighting, will help guide the rational application designer. Technical requirements are as follows:

(1) Long working hours ,color rendering index (Ra) of not less than 80.

(2) The above-mentioned places, LED lights color should not be higher than 4000K.

(3) The above-mentioned places, the special color rendering index R9 LED lamp (saturated red) should be over 0.

(4) The color of the light source in the same place for the same tolerance should not over 5 SDCM.

(5) Deviation chromaticity coordinates and the original values ??(5) the lifetime of the LED lamp in CIE1976 uniform chromaticity scale diagram, not more than 0.007, can be referred to as "color maintained."

(6) LED lamp color coordinates in different directions, their weighted average deviation in CIE1976 uniform chromaticity scale diagram, not more than 0.004 may be referred to as "space chromaticity consistency."

(7) LED lights "lumen maintenance" should be consistent with the product specification, for example as follows:

①LED downlights, according to GB / T29294-2012 claimed lumen maintenance requirements during the life of not less than 70% (L70).

② Reflective self-ballasted LED lights, according to GB / T29294-2012: 25000h life for those who maintain the rate of not less than 92% 6000h.

③ Self-ballasted LED lights, according to GB / T24908-2010: 25000h life for those who maintain the rate of not less than 88% 6000h.

④ Self-ballasted LED lights, "US Energy Star" states: When 25000h ≥70%, when 6000h ≥91.8%.

(8) LED light surface brightness, prone to cause glare large and uncomfortable, you should reduce the surface brightness (if not more than 100kcd / m2), the lamp should be limited glare diffuser should be equipped with a cover, or else there should be no less than 30 ° blackout angle.

(9) should be limited to the LED driving power source and higher harmonic (especially 3 times) content, should be consistent with GB 17625.1-2012 in class C (lighting equipment) specified harmonic limits, pay particular attention to the following lamps and 25W great harmonic measures should be taken.