Light Symposium in Stockholm

19 03 2015

valo15lighting designer

It’s amazing to think that even though we spend two-thirds of our time living under artificial lighting, we’re not paying attention to the consequences for our body and mind. Whereas people are concerned about organic food, pure water and clean air, the element by which our very life came into existence – light – is often forgotten. And most important is the light quality.

The Light Symposium was held during the International Year of Light 2015 Mach 19-20. The objective of the Lighting Symposium 2015 was to be part of and contribute to the International Year of Light. The purpose was  to increase the level of the discussions and general knowledge in the field of Architectural Lighting Design.

Many participants prefer daylight and are bringing daylight from windows inside to the room. However, what about, when the evening comes? Many have not thought that they could simulate daylight inside the room at daytime. They accept the normal  warm light, e.g. 2700 K, which destroys the colors and makes the reading speed slower.  Some have tried 6500 K light and have been disappointed. Please test 5500 K daylight, which has high CRI, 93 – 95. You do not find any difference between the natural daylight. I prefer blue light the morning (e.g. with Litebook or other light therapy box) and 2700 K late in the evening.  A tiny orange/red light, when you go to the WC at night, does not affect the melatonin production.

Here are some interesting lighting links:

The benefits of the newist LED tubes

  1. The risk for fire accidents by old magnetic ballasts will be eliminated.
  2. There is no 50 Hz flickering, like fluorescent lamps, The flickering causes stress and eye strain and head ache. LED tubes have direct current.
  3. You save a lot of energy.
  4. The payback time is  short, e.g. 2 years.
  5. Led  tube is very long lasting.
  6. If old luminaires are still good looking, you have not to buy new luminaires. You could take the gridiron away and replace it with opal plastic and the luminaire looks nicer.
  7. You replace only the fluorescent tube with led tube and replace the starter. If the luminaire has electronic ballast, no starter is needed, if you uses the high quality led tubes.
  8. The light quality of the best led tubes is good, 5500K,  CRI 95. It you have just bought normal led  tubes with 3000 – 4000 K,  you should replace them with daylight tubes. After that you can see better, read faster and see the colors ecactly.
  9. Led tubes saves the nature.
  10. The indirect lighting of the room will be cheaper with led tubes than with led strip. Use T5-tubes.

More information:  ilkka.pekanheimo@gmail.com

Advertisements




Color rendering of LED

22 12 2014

During four million years the human eye has intended to see every target under full spectrum lighting, that is under daylight lighting, where are all seven rainbow colors and millions of colors between them and where the light temperature is ca. 5500 K. Here is a  example of good quality spectrum:

VLspektri2

Here is another way to show the spectrum:

Ledinauha

The spectrum is continuous. I will get soon i little better led strip but this is already acceptable. The CRI should be as high as possible.

However, people are buying LED lamps without the knowledge or light spectrum and color rendering. They are more important than the lumen output. The price is too often more important, although we know that the cheap led costs already during 3-5 years more than a little more expensive led. The spectrum is the most important instrument for light quality. People are living years and years under light with bad quality. The experts in lighting suspect health problems from the cheap LEDs, especially to the children and in countries where there is too little daylight under winter time. Here is an warning example of insufficient light spectrum.

huonospektri

The architects and lighting designers must understand, how big responsibility they have. If they do not make right choices, the risk for making people sick is big.

The influence of lighting to our health 

The research scientist Christian Cajochen at the Basel university tells that the artificial light could have very negative effects. We should concern to the light as a medicine. The quality must be correct, the dose must be correct. The lighting biologists have suggested that we must specify limit values to artificial light, which spectrum is not continuous. Should we limit the staying under conventional lighting? Whos job is to decide the limits? These questions are very important to those people, who cannot get their daily daylight dose because they cannot walk under daylight and sunshine. The light is not only the aid for seeing. It can be also food, vitamin – or even poison. So tells Christian Cajochen.

If you like to discuss more about this subject, please contact

ilkka.pekanheimo@gmail.com





The lighting evaluation of the housing fair in Finland 2014

22 07 2014

In my Finnish blog you can see over 300 lighting pictures. If you like to see 6000 more home lighting pictures from Housing fairs 1998 – 2013, contact ilkka.pekanheimo@gmail.com

adlux.wordpress.com, here are only a few examples:

Wooden panel with led strips. Use full spectrum leds, 5500 K, it shows also the wood color original, not yellow like here.

Wooden panel with led strips. Use full spectrum leds, 5500 K, it shows also the wood color original, not yellow like here.

Avoid these lamps,  too bright,   awful lighting method.

Avoid these lamps, too bright, awful lighting method. Indirect lighting is much better.

Excellent lighting of stairs, led strip.

Excellent lighting of stairs, led strip.

Good indirect lighting, but with daylight led strips you could get it even better.

Good indirect lighting, but with daylight led strips you could get it even better.

Correct place of led strip under the cabin. in the front side of the cabin, the light should go to the direction of back wall.

Correct place of led strip under the cabin. in the front side of the cabin, the light should go to the direction of back wall.

Most of them are bad examples:

  • too bright lamps,  spotlight, dazzling lamps
  • warm tone lamps (2700 – 4200 K), which destroys the colors
  • destroys totally he work of interior decoration designer
  • lamps, which have no full spectrum

However, there are also good examples, e.g. indirect lighting. The whiter light – the better, if the type of the light is full spectrum. I recommend 5500 K. 6000 K is too blue.

Ask my comments from some pictures.  ilkka.pekanheimo@gmail.com





Children’s day-care center got health-promoting lighting

9 03 2014
verkanappulat2p
In April 2014 in Turku was opened children’s day care center. It is lighted with full spectrum Viva-Lite daylight lamps.
Luminaires
  • 74 pcs 580 mm Jasmina plafonds, 2×36 W lamps
  • 8 pcs 800 mm Jasmina plafonds, 2×55 W lamps
  • 23 pcs plafond with presence detector, 2×18 W lamps
Full spectrum daylight lighting has many benefits. The colors and seeing accuracy are excellent, the reading speed is faster than in normal lighting. The light that has effects on health, it is especially important for children.
The children grown under daylight are less myopic and have less eye glasses
This has been showed by Australian and Swedish studies. The best light is, of course, full spectrum daylight outdoors. Also artificial full-spectrum daylight is useful if there is not enough real daylight. e.g. in winter time. Therefore, we recommend that the homes and schools would be illuminated with a stronger  daylight-like light and ask children to stay more in a real outdoor daylight. The longer a child stays outdoors in daylight, the better the vision he gets.  This is evident from the studies by Dr. Kathryn University of Sydney .
Children growing in daylight lighting has even less myopia, that means, the eye glasses are not often  needed .
Stockholm University study shows how important it is to study under full spectrum lamps. Full spectrum  lamps can help tired children. The survey found that schoolchildren were sharper. They were also more active during the day. In the evening, before going to bed, they were more tired. Movement monitors also revealed a better and more peaceful night’s rest.
Here are pictures of daylight Jasmina luminaires.  The lighting has got a lot of positive comments. It differs so much from the traditional.
Jasmina luminaires meets the needs of even the most difficult aspect of ergonomics and gives a pleasant smooth and efficient lighting. Because of the opal cover the brightness is low, and does not dazzle.
In 2015 a similar children’s day-care center will be lighted with full spectrum LED lamps.
More information 
Daylight effect on eye development. Dr. Kathryn research from the University of Sydney
Stockholm School Survey, University of Stockholm stress the Institute’s research




Habitare / Light fair in Helsinki in September 2013

6 10 2013

WT4-valolistan päällä on päivänvaloledinauha. Valo on puhtaan valkoista.

Habitare/Light fair (5 days) was excellent and very successful for me. There were over 54 000 visitors and this is much, because there is only 6,5 million people on Finland.
I had a 30 min. lecture every day.  This lecture was hold three times:  “Led lighting is coming – are you ready”. This was hold twice:  Daylight lighting as an element of  interior decoration.

After the lecture many people came and handshaked me, they told that the lecture was so excellent. The lighting and led information was so new for them.

I was also interviewed in Radio Nova, which is very popular in Finland, during the fair.  No other company at the light fair got such a publicity.

 





The lighting evaluation of the Housing fairs in Finland

1 08 2013

I have evaluated the lighting in the Housing fairs in Finland since 1999, so already 15th time in 2013.Valoa voisi olla hieman enemmänkin. (7)

The main theme of the Raisio housing fair 1997 was natural lighting and light quality.
In front of daylight house president Martti Ahtisaari told to the represents of the Press: “In my home there is also daylight lighting and I like it very much.”
There are total 6047 pictures in my page of the lighting solutions in the Finnish houses. Good and not so good solutions. There is comments in every picture and a school degree evaluation (10 the best, 4 worsest).




One of the best lighted houses in Finland

9 06 2013

It’s amazing to think that even though we spend two-thirds of our time living under artificial lighting, we’re not paying attention to the consequences for our body and mind. Whereas people are concerned about organic food, pure water and clean air, the element by which our very life came into existence – light – is often forgotten.

Päivänvalovalaistusta voidaan himmentää.
One of the best lighted houses in Finland, (June 2013) no halogens or GU-10 LED or similar lamps. A lot of light in a room, no blending, you do not need any ceiling luminaires. The customer is very satisfied. You can do the same with led lamps (strips and panels) but not with spot lamps.
Also this house is lighted near totally with indirect daylight, the customer is very satisfied.

A house lighted with full spectrum daylight at housing fair in  2009. Today I light more and more by daylight led lamps of highest quality. Look the video.