Basic introduction

LED light source is used in the field of lighting because of its low energy consumption and high luminous efficiency. With the development of technology, this kind of lighting is deployed among users in multiple sections. Lamps and lanterns highlight the advantages of energy conservation and have a long service life. The color of the light illuminated by this kind of lamps is highly variable. If the light distribution method is used flexibly and properly, combined with the unique advantages of energy saving, it can be widely used in all kinds of environmental lighting. Also because of the direct light characteristics of LED light source, how to design scientific and reasonable light distribution on lamps is very important. The luminescent characteristics of lamps are closely related to the lighting source, light transmission and reflection, and all kinds of dimming accessories, which have a great impact on the final light distribution curve of lamps. The selection of LED, a new light source, cannot be separated from the selection of light distribution curve.

Technical characteristics

Measure the spatial light intensity distribution curve, light intensity data, regional luminous flux, lamp efficiency, brightness distribution, utilization coefficient and brightness limit curve of lamps. Glare level, budget curve, large allowable distance ratio, effective luminous angle, upward luminous flux, luminous flux, illuminance curve, light intensity curve and other photometric parameters.

Chromaticity test

Method 1 integrating sphere spectroradiometer

Reference standard:

IESNA lm79-08 electrical and photometric measurement of solid state lighting products

Cie15:2004 colorimetry

Cie13.3:1995 evaluation of color rendering of light source

Method 2 distributed spectral radiometer

Reference standard:

Esna lm79-08 electrical and photometric measurement of solid state lighting products

Cie15:2004 colorimetry

Cie13.3:1995 evaluation of color rendering of light source

Test items:

Average color unevenness

Color width capacity (color tolerance)

Relevant color temperature

Color rendering index

Chromatic aberration drift

Chromatic coordinates

Color tolerance

Color space nonuniformity