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Tero Explains: What is EPREL for light sources? 2/3

The first article of this 3-part blog post series was dealing with the near-term history of European directives and regulations related to energy efficiency and different energy-related products (ErP), not only energy-using products (EuP). Starting from Kioto 2005, this process has then proceeded to the situation, where new kinds of regulations have been taken into…

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Meet our new Category Leader

At the beginning of September, Oskari Viitaniemi started in our lighting component sales team as a category leader for power supplies. He will bring a lot of knowledge of sales and logistics to the team with his great experience in the field. His time will mainly go into sales, but he will be also part…

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aLED Modules – high efficacy and quality

aLED products are Arrant Light Oy’s own line of LED modules. We have been designing and producing LED modules since 2008. Our LED modules have been used for mass production luminaires and also for projects that need a special solution like in hospitals, automotive industry, safety light, and architectural lighting. We have dozens of standard LED…

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Season’s Greetings From Arrant-Light Oy

Dear Customers and Partners, It has come again the time of the year when all jobs have been done and it is time to spend a peaceful and relaxing Christmas holiday with our families. Past year has been globally very unstable and time of the big changes. It feels like everything has changed and we…

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Million shades of white LED

Nowadays LEDs have great efficacy and lifetime. They produce more and more light with less power. I think that it’s less important to increase efficacy because we have already reached what the market demands. What else we need from the light than a lot of lumens? In this blog post, I’ll compare the differences between…

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Dim-to-Warm – COB LED that dims like halogen

Dim-to-Warm is COB LED which works like halogen lamp when dimmed. Its specialty is that when you dim it the color temperature gets warmer. Usually dimming does not affect the color temperature of the LED. Dim-to-Warm LED imitates the effect of the halogen lamp which gets warmer by dimming. With full power you can get…

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Microwave Sensors: How to Utilize Them in Lighting?

This blog post deals with microwave sensors. Especially how they are used with general lighting components to realize intelligent lighting systems. Some pictures enlighten the possibilities of microwave sensor technology better than hundreds of words. Microwave Sensors Microwave motion sensors operate in a different way that e.g. more commonly used passive infrared sensors. MW sensor…

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Why Should You Choose the New aLED Module

We redesigned our aLED-modules based on customer and market feedback. Here is  a brief explanation on what is different compared to previous version. And why I think you should consider using aLED modules.   Better efficacy (159-191 lm/W) We upgraded the SMD LEDs used in the modules to better suit our customers’ needs. aLED modules…

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AC COB – Easier way to make a luminaire

What is AC COB? AC COB is brand new AC LED solution from Citizen Electronics. It is available with holder which contains necessary components to connect package directly to mains voltage. So basically it is designed to make life of luminaire manufacturer easier. What advantages? AC COB has integrated circuit which allows you to control…

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Citizen COB lineup

Citizen COB LEDs generation 6 – What is new?

Citizen have released generation 6 from their successful series of Citizen COB LEDs. In this post I’ll go briefly through, what is new and what advantages these COBs have compared to previous generations. There are five main points at generation 6 from Citizen: 1. Performance increase Performance will up to 7% depending on CRI of LEDs.…

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Glass Lens vs. Silicone Lens in Street Light

What is the difference between a lens made from optical glass and the lens made from silicon, when used in street light application? In this blog post, I will explain the pros and cons of both lenses. I will also use a case example to showcase the differences. The Basics First let me explain few…

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Vivid LEDs: Special Color Rendering With Spectrum Tuning

When we talk about color rendering, traditionally that conversation has been filled with CRIs and Ra-indexes. These traditional ways of telling how well certain light source represents sunlight have been criticised because they may not tell the whole truth. In recent years, LED manufacturers have been trying to answer this criticism by creating different products.…

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How to use Citizen LED simulator

Datasheets are essential part when you compare how different light sources work in your solution. Usually it can be time taking and exhausting to glance at datasheet and find values you are looking for. This gets even harder if you have multiple LEDs or different LED packages, which would mean that you have look at…

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What is OLED in Lighting?

OLED means Organic Light Emitting Diode.  It works in similar way than (semiconductor) LED. Both need positive and negative charge carriers to generate electrical current and finally generate light. It is a surface light source based on organic material layers. LED, on the other hand, is a point light source that is based on semiconductor materials. But…

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FAQ: OLED – Panels

From this post, you can find the most frequently asked questions related to OLED panels. The post will be updated in the future if new questions arise. Q: What is OLED? Does it work in the same way as LED? A: OLED means Organic Light Emitting Diode. It works in similar way than (semiconductor) LED.…

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FAQ: aLED Modules

Q:You have the driving current 700mA written in the datasheet of your LED module.  Can I use smaller driving current? A:Yes, you can use smaller current. The current value 700mA mentioned in the module’s data sheet is so-called nominal/typical value that corresponds to the value Citizen announces for voltage and luminous flux (lumens) of the…

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CIE 1960 Chromaticity Diagram

Why the Same Color Temperatures Look Different?

We see more and more light sources that supposed to be exactly the same color temperature, but actually appear different to human eye. So why the same color temperatures look different? When people talk about color temperature, they are usually talking about correlated color temperature instead (CCT). There is a difference between these two. Color…

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How Lifetime Affects the Energy Savings of a Luminaire

Generally, when selecting LED luminaires, the attention is drawn to energy consumption. Efficacy, therefore, the power consumption, is the most important selection criterion. But do you pay attention to the lifetime of the luminaire? What happens if the better efficacy luminaire has shorter lifetime? This means that you may have to renew the luminaires much…

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Flicker in lighting

We get a lot of questions regarding flicker. People are asking what it is and what causes it. I decided to to some research and write a post about the topic. I have very little technical understanding and therefore I try to explain this in simple manner. What is Flicker You all know the effect when it…

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How to affect the lifetime of a LED module

How to affect the lifetime of a LED module Lifetime of a LED module? What it means? Does it mean that LED module does not function anymore after the defined lifetime value? How to determine lifetime for the LED module? This post tries to explain what different lifetime estimation curves mean and how to interpret…

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What is COB LED

COB LEDs are very popular nowadays in LED lighting business. We talk and write about COBs, and our customers use COBs in their luminaires, but what exactly is COB? First of all, the abbreviation COB comes from words Chip-on-Board. In COB packages many LED chips are usually attached to substrate with non-conductive adhesive. LED chips…

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What is aLED?

We released a new brand for our products; aLED. At first this brand is used along with our led modules, but later there will be more products to be labelled aLED. There might be some people, possibly you, wondering what does aLED stand for? And why did we decide to create such a brand? Let…

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The history of LED – part 2

In my previous blog post, I wrote about the general development of the LED. Focus was in the development of LED component. How it was transformed from a laboratory experiment to a mass production of commercial product.  Different colors of LEDs were produced by applying different semiconductor layers on certain substrate materials. Still, there was…

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Letter For Customers and Partners

I am very pleased to be writing this letter to our customers and partners – and to thank all of you who have trusted us over these past 30 years, helping us to sustain and grow the company. The history of Arrant-Light Oy dates back 30 years to when my father, Tarmo Mäkinen, founded the…

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How to Construct a LED Luminaire  

There are many aspects that have to be taken into account when constructing a LED luminaire. In this post I will give you some tips how to build a LED luminaire and which things have to be considered. There are five steps for designing LED luminaires: The definition of lighting requirements; how much you need…

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The history of LED – part 1

When you are talking about the history of some phenomenon, you will end up to the endless question where to start. So is also the case with LED components. As such, light emitting diode is the electrical component which conducts current to only one polarity of voltage, forward voltage, as told in an earlier blog.…

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LED Drivers – Powering the LEDs

LED driver is the source of power for LEDs. Whenever you are building an LED luminaire, you will always need a driver or possibly even multiple drivers. There are different types of LED drivers, as there are different types of LEDs. LED drivers can be divided into two categories: constant current(CC) and constant voltage(CV) drivers.…

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How to choose the right LED?

  There are tons of different LEDs even in one manufacturer’s selection so how on earth can you find the right LED for your solution? In my previous post I discussed about the basic characteristics and operation principles of LEDs. In this post I will discuss about different packages and about the facts that will…

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What is LED?

LED – The replacement for every light source we possess? Thanks to the tightened regulations and more energy efficient approach, LED has started to replace all the traditional lighting. But what do those three letters hold inside? What actually IS LED? Literally, it is a light-emitting diode. Technically it is PN-junction. Functionally it is a…

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