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Renewable Energy

The Compact Flicker Degree (CFD) parameter, a measure for the flickering of lamps

Posted by Marcel van der Steen in Explanation, Led lights No Comments »

CFD_article_teaserThe light coming from (LED) lights can flicker. This effect is measured by OliNo for years already. The parameters given say something about the intensity variations and the frequency, but do not give a verdict. However Peter Erwin, aka Der Lichtpeter, has developed a parameter, called the Compact Flicker Degree (CFD), that analyses the flickering of lamps over a wide spectrum of frequencies and results in a value evaluating the flickering. Also it gives a color result like a traffic light. This article explains the parameter.
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Spectra of Philips Hue Lamp revealed

Posted by Marcel van der Steen in Explanation, Led lights No Comments »

lampThe Philips Hue lamp has been measured in several whites and colors. See this article for the measurement data in graph form and raw data. In the file you also find CCT and CRI data.

 

 

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LED, a hype with prospects for museum purposes?

Posted by Sjoukje Kerman in Energy saving, Led lights 4 Comments »

There lies a collective awareness on the urgency in getting involved with and influencing current environmental issues and climate change in today’s society. This phenomenon is known by the general public as: Greening. It is important, for museums to participate in this occurrence any way possible. To be able to sustain the quality and quantity of our cultural heritage, museums must take matters into their own hands. Visitors (and sponsors) will start demanding it from them. But the real reason museums should start Greening their museums has less to do with a demand from the outside world and far more to do with two essential aspects: an ethical and a financial essence of sufficient and sustainable museum management practice.

KLV Ledverlichting – KLV-MAT5-1147A test.

Posted by Marcel van der Steen in Led lights, Light measurements No Comments »

presents herewith a LED T5 tube fed with 24 V DC that emits a very cold white light.

This article shows the measurement results. Many parameters are also found in the Eulumdat file.

See this overview for a comparison with other light bulbs.

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KLV Ledverlichting – KLV-MAT5-847A test.

Posted by Marcel van der Steen in Led lights, Light measurements No Comments »

presents herewith a T5 ledtube working on 24 V DC that emits a very cold white light.

This article shows the measurement results. Many parameters are also found in the Eulumdat file.

See this overview for a comparison with other light bulbs.

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Tevea – dimmable energy saving lamp XQ09117

Posted by Marcel van der Steen in Led lights, Light measurements No Comments »

Tevea (part of Ranex) presents an energy saving lamp in spot form emitting a warm white light. The lamp has been tested on dim-ability.

This article shows the measurement results. Many parameters are also found in the Eulumdat file.

See this overview for a comparison with other light bulbs.

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Tevea – XQ lite 6.5W dimmable ledlamp E27

Posted by Marcel van der Steen in Led lights, Light measurements No Comments »

Tevea (part of Ranex) presents an led lamp in pear form, emitting warm white light all around. It has an E27 Edison screw fitting. The lamp has been tested on dim-ability.

This article shows the measurement results. Many parameters are also found in the Eulumdat file.

See this overview for a comparison with other light bulbs.

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Tevea – Ledlamp 42xLed E27 XQ0793.

Posted by Marcel van der Steen in Led lights, Light measurements No Comments »

Tevea (part of Ranex) presents an led lamp in pear form, emitting warm white light all around. It has an E27 Edison screw fitting.

This article shows the measurement results. Many parameters are also found in the Eulumdat file.

See this overview for a comparison with other light bulbs.

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Tevea – Ledlamp 36xLed E27 XQ0938.

Posted by Marcel van der Steen in Led lights, Light measurements No Comments »

Tevea (part of Ranex) presents an led lamp in bulb form, emitting warm white light all around. It has an E27 Edison screw fitting.

This article shows the measurement results. Many parameters are also found in the Eulumdat file.

See this overview for a comparison with other light bulbs.

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Tevea – high power 3W Ledlamp XQ with GU10 fitting

Posted by Marcel van der Steen in Led lights, Light measurements No Comments »

Tevea (part of Ranex) presents a high power XQ ledlamp, emitting a warm white light.

This article shows the measurement results. Many parameters are also found in the Eulumdat file.

See this overview for a comparison with other light bulbs.

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