Off beat lighting applications

Perth 10th May 2013

One whole week without travelling! I could get used to it…

I keep being fascinated by a potential project that involves deep level submarine type lighting. Off-beat lighting applications have always had my interest as it keeps your mind alert and sharp while your daily run of the mill projects at times may lull you into a false routine pattern. A few years ago we did a two year study and research into the effects of intrusive lighting on the natural habitat of protected turtles and turtle breeding, The extensive study which involved several trips during various seasons to the proposed site of the development (a remote island in the pacific) included many experts and actual lighting tests to see how turtle seedlings were reacting to different types and intensities of lighting. It culminated in a report (of which our lighting research was just a one of the chapters) outlining the overall environmental impact of the proposed development. It was an extremely educational process for us and helped understand far better the intrinsic qualities of lighting…

Lighting characteristics underwater are also very interesting. Light travels differently in water then in air. First light is reflected, refracted by water. Light only partly penetrates into (clear) water and as it travels deeper it quickly loses its intensity as well. From oceanic research it appears that bright day light can reach only to about 200m deep after which you find yourself in the deep ocean darkness… The lighting intensity decreases very rapidly over distance. At 40-50m deep the lighting intensity is already reduced to about 25% of its original intensity! Not only that the light colours are absorbed along the way as well. Of the spectrum red is the first colour to go (within the first few meters already) followed by orange, yellow and green. Not surprisingly blue holds out the longest, hence that deep sea pictures that still have daylight appear greenish/ bluish… Artificially reproducing daylight at deeper water levels is therefore quite a challenge…

Light Watch 4-82: Here are some deep sea pictures to give you a feel of it…have a great weekend!

10. May 2013 by Martin Klaasen
Categories: light watch, lighting applications, lighting design | Leave a comment

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