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: