The Key Parameters that Define LED Light Source Consistency

Author:Admin      Publish time: September 14, 2023      Origin: Site

Color consistency is a significant concern in LED lighting. The article discusses how the color of LED lights can vary from one product to another due to various factors like manufacturing processes and the "binning" of LED chips. Manufacturers have made efforts to improve color consistency, but variations can still occur, especially when ordering from multiple or newer manufacturers. Technological solutions like color tuning and high-quality modules are available to mitigate these issues.

Why is LED Light Source Consistency Important?

LED Ligh Source with great lighting Consistency ensures uniform illumination across a space, enhancing aesthetic appeal; it meets professional requirements in settings like photography studios or medical labs where consistent lighting is crucial for accurate results; and it contributes to energy efficiency by preventing some LEDs from overcompensating for others, thereby optimizing energy usage. Overall, consistent LED lighting improves visual comfort, functional performance, and energy sustainability.

 

The consistency of a light source is best reflected in the following parameters

 

SDCM (Standard Deviation of Color Matching):

This is a unit that describes how far the color point of a light source deviates from its target color point. A lower SDCM value indicates better color consistency. It's often used in conjunction with MacAdam Ellipses to quantify color consistency. Generally, an SDCM of 3 or less is considered excellent.

 

R9 Value:

This is a measure of how accurately a light source renders red tones, which are particularly challenging for LEDs. A high R9 value indicates better color rendering for reds, which is important in applications where color accuracy is crucial, such as medical lighting or art galleries.

Color Temperature:

Narrow CCT Range:All the LEDs in the bulb should fall within a very narrow range of color temperatures. For example, if the bulb is designed to emit warm white light(2700K), all LEDs should have a CCT within a tight range, say 2700K±100K ,±50K ,like this, more narrow Color temperature Range, greater lighting color consistency.

Consistency Over Time (VERY Important)

A high-quality consistency LED bulb should maintain its CCT over its lifespan, without significant shifts in color temperature after working on long time such as 6000 hours

Luminous Flux:

Consistent luminous flux, measured in lumens, ensures that all areas within a space are equally illuminated, avoiding dark spots or overly bright areas.

Color Rendering Index (CRI):

A CRI value above 90 is generally considered excellent and indicates that the light source renders colors very accurately compared to natural light.

Forward Voltage:

Consistency in forward voltage ensures that all LEDs operate efficiently under the same electrical conditions, contributing to energy efficiency.

Chromaticity Coordinates:

For excellent consistency, the x and y coordinates for all LEDs in a bulb or lighting installation should fall within a very tight tolerance range. This ensures that all LEDs are emitting light of almost the same color

 

Many of these parameters that reflect consistency, such as CCT, CRI, and chromaticity coordinates, are typically measured through an integrating sphere report. However, most LED manufacturers do not test every single bulb in each order due to the labor-intensive nature of such testing and the impracticality of arranging manual tests for each one. As a specialized manufacturer of G4 and G9 LED bulbs, we can achieve 100% Quality Control through precise integrating sphere reports. Our custom-designed full-inspection machine allows us to meet this goal,CCT±50K,SDCM<2/3,RA>90 etc your customized requirement.

 

 

Any more question, welcome to contact us sales@sacolighting.com