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Articles and Essays

Professional articles and essays about Light & Optics. Written by Manfred Eickhorst, previously published in international professional magazines and newspapers.

Excellent Lighting: A Necessity, Not a Luxury
Article by Manfred Eickhorst, previously published on the ICA's website www.gemstone.org.
The colour...
Why Fullspectrum Light is better for you
Fullspectrum light has a greater effect on the well-being than conventional light. Read more here.
Enlighten the experienced gemmologist
How to reduce the surface reflections from a gemstone
One of the difficulties in viewing the interior of a gemstone with amicroscope is caused by light rays reflected back from the stone’s facets. How to reduce theses difficulties is described in this article written by Peter Read.
Gems & Lighting - Article by Manfred Eickhorst for the ICA Website
Article by Manfred Eickhorst, previously published on the ICA's website www.gemstone.org.
The colour...
More light for elderly eyes at work and living
Professional article by Manfred Eickhorst, published in "Mensch & Büro" 3/2004.

The eyes of elderly people need more light, but at the same time are dazzled more easily than younger eyes. Lamps designed for adjustment to personal needs...

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Know-How

Articles and Essays

Excellent Lighting: A Necessity, Not a Luxury

Why Fullspectrum Light is better for you

Enlighten the experienced gemmologist

How to reduce the surface reflections from a gemstone

Gems & Lighting - Article by Manfred Eickhorst for the ICA Website

More light for elderly eyes at work and living