yujileds

Understand the benefit and harm of UV

Understand the benefit and harm of UV

The different UV light brings different benefits For most people, the first use of UV light is often the time to verify the authenticity of banknotes. Banknote under UV-A This ...
MDER, a metric that helps with your lighting design for concentrating

MDER, a metric that helps with your lighting design for concentrating

What is MDER and how does it work?MDER is the abbreviation of Melanopic Daylight Efficacy Ratio, which is defined by the CIE and introduced in the CIE S 026/E:2018 document. Also called the Melanopic ...
Understanding the blue light hazard

Understanding the blue light hazard

What is exactly the blue-ray hazard? Blue light is a kind of high-energy short wave visible light (HEV), which refers to the blue part of visible light. Its harm is mainly concentrated in the 380 nm ~...
High CRI LED vs high CRI OLED, which do you choose?

High CRI LED vs high CRI OLED, which do you choose?

OLED (Organic Light-Emitting Diode) is no longer a novelty, it is already widely known since display screens of television, mobile phone started with it earlier, now the general lighting ...
Are CRI and luminous efficacy influencing the Photon Efficacy?

Are CRI and luminous efficacy influencing the 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...
What is TLCI (Television Lighting Consistency Index)?

What is TLCI (Television Lighting Consistency Index)?

Considering television lighting must have a minimum quality standard in order to satisfy the audience, the international exchange of programs and the archive, TLCI (The Television Light...
What is TM-30?

What is TM-30?

TM-30 metric is first mentioned in 2015 as TM-30-15, which is defined by Illuminating Engineering Society (IES), providing quantified measurements on overall average properties and...
LED lighting and color science [1-Science behind phenomenon]

LED lighting and color science [1-Science behind phenomenon]

Trick 1: Have you ever experienced that when you choose merchandise with your preferable color, sometimes the color changes when you take it out of the shop and view it under the sun, and sometimes th...
Less is more – YUJILEDS® releases its 3rd generation of chromaticity bin

Less is more – YUJILEDS® releases its 3rd generation of chromaticity bin

Tighter chromaticity tolerance is always pursued by LED manufacturers since color consistency is getting more and more important. A general method is keeping the SDCM (Standard Deviation Color Matchin...
Why high price for high-quality LED products? Part – 3

Why high price for high-quality LED products? Part – 3

LED lamps are directly or indirectly exposed to the air with a certain degree of moisture. Imagine there’s a poorly designed structure that is not moisture resistant enough, and the moisture penetrates the lamp. Now that it’s been lit up for long hours and is wet, the resin falls off from the metal substrate, pulls apart the welded wires, and eventually cuts the connected circuit. A deficient design may restrict the fields, places, and conditions of product usage. That’s why LED designers and manufacturers have to always focus on the moisture-resistance structure. That requires the best compatibility of resin and metal substrates, advanced injection molding technology, appropriate molding temperature, and molding process time.