Resource - Yujileds

Yuji Binning VS MacAdam Ellipses

In 1942, David Macadam created 25 ellipses to measure and judge the consistency of different colors.Later, ANSI (American National Standards Institute) C78.377 suggested the standard of lighting shoul...

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Recent developments

Our Progress1. Expanded binning options to reduce green/magenta shiftSome of our initial violet chip LED batches had a slightly noticeable green tint. We quickly found the reason was the deviation of ...

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Light and Productivity in the Workplace

Lighting is one’s work environment that has a large impact on productivity. Although it may not be obvious at first glance, the type and strength of the lighting in a workplace greatly affects the p...

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Five things you should know about color viewing conditions-Color Quality

While color and density measurements play important roles in the control of color reproduction, they cannot replace the human observer for final assessment of the quality of complex images. Color refl...

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Five things you should know about color viewing conditions Part Two: Light Intensity

In color management and print quality verification processes, visual assessment of colors is a key. In order to acquire color accuracy, a proper lighting condition becomes a must. The ISO3664:2009 sta...

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A Deep Tour on LED Phosphor Part I: What is LED Phosphor?

What is LED phosphor？LED phosphor, in a narrow sense, is a kind of Photoluminescent materials can absorb the energy of violet and blue light from gallium nitride or oth...

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A Deep Tour on LED Phosphor Part II: Phosphor’s Performance

What are the characteristics of LED phosphors and their impacts on the performance of packaged LEDs? The performance of LED phosphors mainly can be divided into the powder properties, particle size di...

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A Deep Tour on LED Phosphor Part III: Performance of Phosphor Based LEDs

The Parameters of LED Device1. Luminous Flux and luminous efficacyLED luminous flux is the amount of light emitted per unit time, and LED luminous efficacy is the LED luminous flux per unit power. The...

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Are CRI and luminous efficacy influencing the photosynthetic photon efficacy?

Customers ask for high CRI LED for their plant growth projects at times, and sometimes this confuses us that why a well color rendered LED for human vision is also desired for plant growth?In order to...

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Notice of Logo Change

New logo, new mission For the past years, Yujileds® has been dedicated to providing outstanding LED products and services for specific applications and is proud to announce the successes in glob...

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