Finnish presidents has excellent luminaires

1 12 2017

President Sauli Niinistö has just got a Finnish design luminaire Senator from my colleague Jukka Jokiniemi, Innolux Oy.

However, I have also given table luminaire, made in Finland, but to President Martti Ahtisaari, for many years ago.

In the picture this white luminaire is on the desk of president Martti Ahtisaari, The same luminaire is also on the desks of his assistants. The light in the luminaire is daylight, 5500 K, so the colours in the light are real, as in the nature. It is possible to read even 20 % faster under daylight lamp than in normal artificial light. Could this be one of the reasons, why Finland is the best country in the world.

How to light the Finnish Flag, when Finland celebrates 100 years

26 11 2017

 Finland’s big year 2017

Finland became an independent state on 6 December 1917. The newly born state was willed into being by the Finns after a long struggle. In spite of hard times, the Finnish people have for almost a hundred years engaged in the building of their country and making decisions together. Now the Finns are leading their country into a new century with courage and determination.

The centenary of Finland’s independence in 2017 will be the most significant commemorative year for this generation of Finns. The centenary emphasises Finland’s strengths, such as equality and democracy by offering Finns and friends of Finland diverse and international centenary programme in Finland and abroad. The centenary year provides opportunities to better understand the past, experience the jubilee together and set the course for Finland’s future success.

Come and join the celebration!

The government of Finland advises: if you light the flag in the evening or at night, you must light the flag so well that you see the colors well. White must be white and blue must be blue.

However, practically many are lighting the flag with 2700 – 4000 K light. It turns the blue color to violet an white color to dirty yellow. This disparages the Finnish flag. 

suomen lippu3


On the left the Finnish flag lighted with normal, warm light (2700 – 3000 K). On the right the Finnish flag lighted with daylight (5500 K). In warm light you can see blue as violet and white as dirty yellow. In daylight you can see blue as blue and white as pure white.


Ilkka Pekanheimo, lighting designer, member of Illuminating Engineering Society (IES) of Finland, Turku, 358 400 221421,

2015 in review

30 12 2015

The stats helper monkeys prepared a 2015 annual report for this blog.

Here’s an excerpt:

A San Francisco cable car holds 60 people. This blog was viewed about 1,500 times in 2015. If it were a cable car, it would take about 25 trips to carry that many people.

Click here to see the complete report.

Lighting ideas, which are suitable with T5 LED tubes

10 06 2015

Please contact the managing director of AD-Lux Oy, if you like to see the missing pictures in this article. He has  “destroyed” the pictures from the server. 

Since the origin of life, the light has guided us, our activities and our biological clock. We feel the best in the natural light outdoors, where intensity and color changes all the time. With dynamic light we can create better lighting with people in focus.

Lighting affects how we see our surroundings. Dynamic lighting for the future houses goes further, affecting impacting how we think and feel too.

The fact that blue light activate and warm light calms, in increasing substantiated, it is all about imitating the natural light and its variation that has controlled our biological clock since the origin of life.

Where do we apply solutions with color temperature control? The answer is: in any room with limited access to daylight or rooms where for any other reason want to be able to vary the color temperature.

Our preference for color temperature isn’t static, sometimes we want a cold, activating light, sometimes warm, relaxing light.

The biological clock, also called the circadian rhythm and plays an important role in regulating wakefulness and sleep. If we can help that clock, we can help people feel better. By designing good lighting systems, lighting can help increase concentration and motivation and to improve subjective and objective well-being.

The ideal is simply to imitate natural light, both in level and color during the day. Cold, intense light with a high blue is activating, warm dimmed light is relaxing.

Why daylight also inside the house? Lighting in home and work environment has the past decades been monotonously warm, yellowish and not showing colors correctly. A question arises: why? You have to try it to believe. We recommend you to test before moving to daylight because of the big difference from traditional lighting. Lighting and colors are a big part of the whole of living. They have an affect on functionality and comfort but also on atmosphere.

Goals of good lighting design human and eyefriendly lighting non-glaring result child- and firesafe lighting lighting that helps your seeing also with older eyes colours of interior are shown as they are overall economic and energy saving solution isn´t harmful to climate change

In the evening light could be warm-toned, ”more ambient” light, especially if light is not needed e.g. for reading. Finally you can turn off the lamps and light candles. Many people become so fond of daylight type light, that they want to have it all day long, also in the evening.


Our preference for colour temperature isn’t static, sometimes we want a cold, activating light, others a warm relaxing one. Our preferences for light can also differ with age; the young are inclined towards a colder light while as we get older this changes to warm.

Lighting with modern led tubes is not expensive. This is because no luminaire is needed. Only lamp holder and wire to each end of the tube. The wire will be connected to 230 V and no ballasts are needed.


Here are some examples of different rooms, where led tubes could be used.


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 lamp under the cabin is in the front side of the cabin, the light should go to the direction of back wall.  In this picture led strip is used but led tube is more economical.

One of the most important things to consider when choosing a kitchen hood is to get enough light on the stove. The lamp should not glare from the stove, which is normal with led or halogen spots. Better solution is led tubes, 600 mm.


Excellent lighting of stairs, led strip.

Excellent lighting of stairs, T5 led tube.


Just get one wooden panel away and put opal plastic (3mm, 72 %) instead of it. And led tubes in 5 cm distance of the plastic panel. No other light is needed in the whole room.

Indirect lighing. Unfortunately the yellow color of the lighting destroys the colours of interior decorating..

Indirect lighting


Lighting with daylight led tubes. You could install on the other side also 3000 – 4000 K led tubes and put light there on the evenigs.

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

Good indirect lighting, but with daylight led lamps you could get it even better. You can use 1-2 warm tone led tube ans use them only in the evening.

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 lamp. Use full spectrum leds, 5500 K, it shows also the wood color original. You can use this solution in every room.

Valoa voisi olla hieman enemmänkin. (7)

Päivänvalovalaistusta voidaan himmentää.


Led tubes are  good solution here. You get indirect light.

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:

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:


Here is another way to show the spectrum:


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.


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

My full spectrum daylight ideas may be unique in the whole Europe.

30 09 2012

I like to learn a lot of lighting you never seen before:

  • Indirect lighting with different light shelves
  • Lighting through opal plastic panels
  • Disguising of the basic light fixture on opal plastic
  • Bar light fixture, indirect light in the middle of room
  • Daylight LED panels, dimmable or non-dimmable
  • The newest LED products, LED tubes, E-27, GU10, MR16, E-14, GX53, panels

How to light different rooms at home

  • Lighting of the hall
  • Lighting of the kitchen
  • Lighting of the living room
  • Lighting of the nursery, childproof lighting which increases reading speed and lighting which reduces the fatigue of eyes
  • Lighting of the utility room and of the piece of clothing room
  • Lighting of the toilet
  • Lighting of the bathroom, high-quality mirror cupboard
  • Lighting of the workroom
  • Lighting of the stairs
  • Lighting of the sauna
  • Lighting of a technical state and warehouse
  • Lighting of the home theatre
  • Outdoor lighting
  • Lighting of the negotiation room

Avoid spot lamps and down light lamps, especially in families with children.

Here is a bad and good example.

There was planned near 100 pieces of led lamps (or halogens) in the ceiling. Because there was three children in the family, we took a red pencil and stoke all the down light lamps away. If a child lies on the floor, his eyes goes directly to the brightest light on the ceiling and can see the light several minutes. This is not a healthy situation.

The family tested our indirect lighting and the result is this:

Excellent example of lighting plan

Indirect light in the living room, all bed rooms, kitchen and working room. And when it comes direct lighting (led panels or plafonds), the diameter of the luminaire should be at least 300 mm. If it is only 50 mm or smaller, the light causes bad blending.

Collect a group of  5 – 20 persons, I will keep the lecture on the subject, which is suitable to you.

  • Lighting of the home and colours
  • Daylight as interior decoration element of the home
  • Lighting of the home – the most important interior decoration element
  • Lighting which increases work satisfaction and industrial safety

We tell about the significance of the daylight light as interior decoration element of a home and job. You see good examples of the separate premises of the home which have been lit well and stylishly. Up for discussion there are undazzled alternatives of the direct and indirect lighting and examples of the traditional ways to light also. With the lecture it is dealt with

  • significance of the lighting planning in building and decoration. In the comparison it also is traditional and ledLED lighting.
  • I advise how to choose the right lamp to home and to job.

The lighting ideas are emphasised

  • advantageous
  • energy saving
  • child safety and fire safety
  • in work lighting raising of the vigour state and improvement of industrial safety and feeling happy with the lighting

Read more.

A new house full of full spectrum daylight

1 01 2012
This house is fully illuminated with Viva-Lite full spectrum daylight lamps. There are totally 49 lamps. You can enjoy this kind of lighting for decades. The interior colors are natural, true. Lighting solutions are long-lasting, chosen on sustainable basis, energy-friendly. Residents of the house are is very happy with the lighting. The carpenter was surprised, because he could see very well in this light, even without glasses. Seeing in normal warm color light was a challenge for him like for many others. The quality of the pure light is amazing, therefore, it has to be seen.
In 2015 similar house would lighted only with led lamps and the result would be as good.

Hello full spectrum daylightlight lovers

31 12 2010

Welcome to this full spectrum daylight blog with positive attitude!

Northern Light Fair, Stockholm 9.-13.2.2010

13 02 2010
Light, but with quality

Light, but with quality

The lighting designers of AD-Lux, Tuomo and Ilkka,  found some interesting products at the Light fair. There were plenty of energy saving lamps and even more LED-lamps. The era of halogen lamps was over.