Binning

In the process of binning, LEDs are sorted and classified into so-called "bins" (containers) due to manufacturing tolerances and the resulting parameter variations. Binning thus ensures consistency or a lighting standard for LEDs and guarantees that all LEDs within a bin share the same characteristics. The tighter the tolerances are set, the higher the quality of LED systems consisting of more than one LED.

ANSI LED Binning Standard

The ANSI LED Binning Standard (ANSI C78.377) is a norm developed by the American National Standards Institute (ANSI) to classify the performance and quality of light-emitting diodes (LEDs). This standard sets specific criteria for binning LEDs, where "binning" describes the process of categorizing LEDs based on their characteristics. The goal of the ANSI LED Binning Standard is to promote uniformity in the LED industry and ensure that manufacturers and customers receive clear and consistent information about LED products.

Parameters of ANSI LED Binning:

Correlated Color Temperature (CCT): Specifies the color temperature of the light in Kelvin (K), e.g., 2700K (warm white) or 5000K (daylight white).
Chromaticity Coordinates: The color position on the CIE 1931 color diagram, defined by the x and y coordinates. This describes the precise color perception of the LED.
Color Deviation (MacAdam Ellipses/Steps): Describes the permissible color variation within a bin. The standard typically uses a 4-step MacAdam ellipse as the tolerance range.
Luminous Flux: The amount of light emitted by the LED, measured in lumens. This indicates the brightness of the LED.
Color Rendering Index (CRI): A measure of how well an LED reproduces the colors of an illuminated object compared to natural light. Higher CRI values (on a scale from 0 to 100) indicate better color rendering.
Voltage Binning: The voltage range in which the LED flow voltage lies when operating with nominal current. Measured in volts.
Luminous Efficacy (Efficiency): The ratio of emitted luminous flux (lumens) to electrical power consumed (watts). It is measured in lumens per watt (lm/W) and describes the energy efficiency of the LED.

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