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   LED knowledge

1. IP RATING : IPXX
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First digit: Solid particle protection

0 No special protection.

1 Protection from solid objects greater than 50mm in diameter.

2 Protection against object not greater than 12.5mm in diameter.

3 Protection from a diameter of 2.5mm or more.
4 Protection against solid objects larger than 1 mm.

5 Partial protection against dust
6 Dust tight


Second digit: Liquid ingress protection

0 No protection.

1 Protection against vertically falling droplets

2 Protection against water droplets deflected up to 15° from vertical

3 Protection against spray up to 60° from vertical

4 Protection against water splashes from any directions

5 Protection against low-presure jets of directed water from any directions

6 Protection against direct high pressure jets

7 Protection against temporary immersion

8 Protection against extended immersion under higher pressure



2. LED luminous decay

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Unlike conventional light source which fails eventually , LED products don't normally fail suddenly. Instead, the light output reduces overtime. LM-80 test is a method and index for luminous maintenance.


To calculate the LED lifespan through LM-80 test report.

L70 (hours): means how long the luminous of light source is reduced to 70%

L90 (hours): means how long the luminous of light source is reduced to 90%

The products provided by Range will consider the lifespan of light source, and we will ask supplier to provide LM-80 report.


Note: For the LM-80 report, please consult sales rep.


3. LED color temperature

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6500K cool white for commerical applications;

4000K warm white for residential commerical applications;

3000K  warm white for residential applications;

2700K warm white color as fire;

Color temperature can be castomized.





































4. Color rendering index for white led

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Generally, higher CRI is more close to the true color of the Sun light and the color of the object. The LED products suppied by Range are usually more than 95 according to customers' requirements , which can really restore the color of the commodities in LED lighting and thus stimulate the customers' shopping desire.







































R9 is rendering capability of red color. Highter value is more close to the original color. Simply to say, the higher R9 is for the lighting products.                                                                                                                                                      The better effect and bright-colored will be shown on the fruit or flowers.
























R15 is rendering capability to skin of Asian woman, higher R15 is more close to the original color of the skin. It is important in special counter lighting like cosmetic and clothing industry.