Comments for LIGHT TALK

Comment on bLEEDing away by Martin Klaasen

Martin Klaasen — Mon, 20 Feb 2012 13:35:44 +0000

Sathish
That is not a simple question I dont have SS556 handy so I have to answer of the top of my head, but I always wonder where they get these kind of values, we dont see luxes we see the reflection of light…So lighting levels are just a guide with the key being the actual lighting design that you apply to achieve the end result, in considration that there are many different ways to create your lighting. But most of all you must be able to anticipate what you will actally see, how your lighting will interact, not only with the water surface but with the complete pool space. In a residential social environment it is about safety/ security versus ambiance/ mood of course with an eye on energy, with the key elements to deal with being glare and reflections (water!). Angle of incidence, lighting layout versus the swimmers and the residential blocks around it! The question is what is safer, more efficient and more apropriate, floodlights from outside on to the water, or good lighting from inside the pool (under water)…See also my blog today. If you dont consider all other design and human comfort aspects what is the meaning of 80 lux??? Does it make sense?
Cheers
Martin

Comment on bLEEDing away by sathish kumar

sathish kumar — Sun, 19 Feb 2012 04:56:56 +0000

Dear Martin,

How about your stand on achieving 80 lux over the water surface of swimming pool in residential developments as per SS556? Does it overkill the ambiance if we do that?

regards,
Sathish

Comment on Carbon tax by Dr. Yen Kheng TAN

Dr. Yen Kheng TAN — Thu, 10 Nov 2011 04:33:14 +0000

Dear All, this is a LVDC LED lightings test bed with smart control developed back in our Energy Research Institute @ NTU (ERI@N). Should you have any enquiry, please feel free to contact me.

Comment on The value of our services by MEHRAN SHAFAGHI RAD

MEHRAN SHAFAGHI RAD — Mon, 31 Oct 2011 18:45:46 +0000

Dear Sir,I always look for originalities and this is also unique.the expression within the lights and the definition that has been tried to send through the stand under different colors is well judged and infact Ilernt that the dark color has specific derivities of diffrent ray starting from purple and finishing to red I think it matches the low of breking the dakness and ending up having almost rainbow!!!also the satand out of colors highest as moves towards orange and intervals of parity 2 (as in 1 2 hi 1 2 hi).perfect design of photo inner sole.
yours Mehran

Comment on The art of lighting (artwork) by Andrew Hennig

Andrew Hennig — Sun, 30 Oct 2011 14:23:45 +0000

Hello, I like your article about light. I have been making artwork with lighting lately and thought you would like to see it.
Cheers Andrew

Comment on I feel the temperature rising by Drees Oellerich

Drees Oellerich — Wed, 19 Oct 2011 09:41:05 +0000

Hi Martin,

sorry for the late response;

SPINLEDs do generate a kind of intermittent light to the plants (chopperlight.com), by cycling around a propeller with LEDs on it. We actually are trying to figure out the best rotation-speed for photosynthetic reaction considering the characteristics of LED operation temperature and scale of visual effect to the human eye. Temporarily we rotate in the range of 2-5 cycles per second. But regarding the human eye and that almost every PAR-Lamp needs to “look good”, we are working on a solution to speed up the rotation to more than 25 per second. Now, depending on the visual frequency of specified animal types, a high rotation speed definitely has to be adapted, to avoid irritation. I could imagine a wide range of application beside biotechnology, because the kind how the SPINLEDs work is very different to all high energy lamps on the market. I also think about MINI-SPINLEDS, an alternative for lenses on LEDs. The key benefits are: no separate cooling, a very good mix of wavelength depending on the free selectable LED colors, extreme decrease of shadowing and very low heat-radiation to the ground. A special LED-board-air-screw even could direct the air flow from or to the surface.

Thinking about a SPINLED for bats; In this special kind of illumination, not only the wavelength seems to be important, also the fact of animal echolocation and that the SPINLEDs are rotating objects, make me curious to think more about it.

-Drees

Comment on I feel the temperature rising by Martin Klaasen

Martin Klaasen — Wed, 28 Sep 2011 13:16:54 +0000

Dear Drees
Thanks for your interesting feedback. Photosynthesis, lighting for plant growth, is an interesting subject similar to lighting for endangered animals like turtles and bats as it uses parts of the spectrum that are not necessarily related or important to human needs, but yet have to be integrated in our everyday environment. I am not familiar with “moving lights” in greenhouses, let alone the SPINLEDs, could you eleborate a bit more on their workings and how this benefits plant growth? Is this only suitable for the biotechnology industry or could there be more and wider applications?

Comment on I feel the temperature rising by Drees Oellerich

Drees Oellerich — Tue, 27 Sep 2011 12:46:37 +0000

Hello Martin,
I also was concerned with the actual disadvantages of LEDs. Specialized as grow light for plants – I am a biotechnology man – I came to one fundametal conclusion. Maybe we still use the energy of light, especially provided by light emitting diodes, imperfect ? I started to think about moving lights as they are known in greenhouses. And I figured out a moving light for LEDs with high light energy and high grow light per ²ft and low input energy cause the reduction of the number of LEDs. It is an actual project and we call it SPINLEDS. Maybe this can be another thought-provoking impulse for your valuable investigations.

Comment on Due diligence by Siddharth Mathur

Siddharth Mathur — Wed, 14 Sep 2011 11:54:35 +0000

I think you are doing the right thing, as we ‘gotto watch our back’ as they say. Most times it is unto the lighting designer himself to ensure that all goes as per plan – not that it does go as per plan eventually, but the risk exposure is definitely minimized. I beg your pardon, as I don’t want to teach a fish how to swim – but in such instances its a good idea to talk to local suppliers or manufacturers who may have a local presence, and get a feeler from them if they have worked with the said client organisation before. Any feedback of course, to be taken with a pinch of salt.

Comment on Cross border challenges by Arie Witherow

Arie Witherow — Tue, 16 Aug 2011 10:02:57 +0000

You made some good points there.I did a search on the topic and found most people will agree with your blog.Thanks