Archive for the ‘english’ Category

It’s too early to implement human-centric lighting, the world authority on the subject has declared.

Quelle: ‘Too early to start human-centric lighting’ – top scientist

Grassroots action to educate Congress and remove mercury from our medicine.

Quelle: Get Mercury out of Medicine: World Mercury Project | Indiegogo

Remarks from Alexander Wunsch:

Mercury – the major component of fluorescent lamp fillings is a potent neurotoxin which should be avoided wherever it is possible. Banning of incandescent lamps has led to a shift to fluorescent lamps (FL) and LEDs. Both are non-thermal light sources with incomplete spectrum. FL emit the spectral lines of mercury, which means, that the photons carry exactly the quantum energy which is able to excite mercury atoms photochemically. This could lead to increased chemical reactivity and toxicity, if mercury atoms flowing in your bloodstream are reached by light from artificial light sources containing this deleterious heavy metal. Remember: capillary vessels are located only 1/10 th of a millimeter beyond the skin suface.

Getting mercury out of medicine and out of the air you are breathing may result in a significant health improvement!

By exposing mice in the early stages of Alzheimer’s to flickering LEDs, researchers were able to reduce their brains‘ production of beta amyloids, a protein associated with the disease. Though still in its early stages, the research could lead to a noninvasive treatment option for the millions of people suffering from Alzheimer’s worldwide.

Quelle: We May Be Able to Treat Alzheimers With Light

This presentation was delivered last week (14.10.2016) during the LightSymposium 2016 in Wismar, Germany. I tried to provide an insight into the complicated neuroendocrine mechanisms which are mainly controlled by light. Again, it started with a short introduction explaining the (chemical) evolution on planet earth. The three main chapters concern biochemical, anatomical and functional photoendocrinology in animal and man, based on the fundamental work of Prof. Fritz Hollwich. The end of the presentation challenges the contemporary concept of „Human Centric Lighting“.

This lecture from Alexander Wunsch was presented at the 84th International Conference on Light and Vision of the College of Syntonic Optometry (CSO) in Indianapolis, IN, USA.
In photobiology, the definition of action spectra is a crucial step in understanding the underlying mechanisms. Once the action spectrum is found, it often serves as a guide for phototherapeutic interventions, aiming to match the wavelength as closely as possible. Lasers and LED light sources are on the rise and widely available. Monochromatic light is highly effective – but mother nature´s light sources are differently composed. The presentation discusses the value of diligently combined wavelengths even from opposite regions of the light spectrum for phototherapy, photoprevention and cosmetic use.
Remarks: Some of the topics have been addressed in other presentations provided on my vimeo account. Anyhow, repetitions can help to make things clearer. Or, in Latin words: repetitio est mater studiorum…

Direct detection of a single photon by humans

Quelle: Direct detection of a single photon by humans : Nature Communications : Nature Research

I have just discovered that this amazing book from Prof. Fritz Hollwich can be downloaded from Springer Link as a pdf at a very reasonable price ($69.99) compared to the softcover reprint (e. g. Amazon, 93.08 €) and original hardcover edition (e. g. Amazon, 551.70 € and more…).

From the preface:

„This book was written to show that light is a primal element of life. All life originates and develops under the influence of the light of the sun, that „super­ terrestrial natural force“ (Goethe).“

„Sunlight influences the vital processes not only of the plant (e. g. , heliotropism, photosynthesis) and the animal (e. g. , color change, maturation of the gonads) but of man as well. The human organism too reacts „heliotropically,“ as the 24­ hour rhythm of the sleep-waking cycle demonstrates.“

„Artists have always perceived clearly the intensive stimulatory effect sunlight on their activity.“

„One is reminded here of Cesare Lombroso, who wrote to his daughter „that thoughts come in the greatest profusion when (my) room is flooded with the sun’s rays.“ Richard Wagner exclaimed: „If only the sun would come out, I would have the score finished in no time.“ Bernard Shaw had a little cottage where he worked that could be turned according to the position of the sun. The composer Humperdinck wrote: „The sun is indispensable for my work; that is why it is important for me to have my study face east or south.“ As these few examples indicate, it is above all those active in the arts who intuitively grasp the positive influence of sunlight on the psycho-physical efficiency of their organism.“

„In an age, however, when fluorescent lighting turns night into day, we are in danger of forgetting that man is a creature of nature as well as of culture.“

„Artificial light cannot replace natural daylight.“

Artificial light at night (ALAN) and the American Medical Association (AMA)…

Quelle: AMA Adopts Community Guidance to Reduce the Harmful Human and Environmental Effects of High Intensity Street Lighting


ALAN 2016


Phase-out of inefficient lamps postponed to 1 September 2018 – Energy

Quelle: Phase-out of inefficient lamps postponed to 1 September 2018 – European Commission

Time is running out! Make sure to reinforce your supply chain and to put sufficient amounts of halogen lamps on stock…

Energy efficiency is just a matter of definition: If you only look at the visible parts, calculations may be correct. If you take biologically relevant parts into account as well (even if they are invisible, such as IR-A/NIR), results may appear significantly different…