EC001744 (Downlight/spot/floodlight) vs. EC002892 (Ceiling-/wall luminaire)

Last comment 10/09/2018 16:47 by Roberto
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Roberto Ortega 4 years ago created
Hello,

I understand that a downlight/spot/floodlight illuminates a more delimitated area than a ceiling/wall luminaire. However, where does one class end and the other class begin? Is the difference based on how directional the light is, or is there something else, such as the shape of the luminaire?

Here is a product I am doubting about. It is a built-in led luminaire: http://www.arkoslight.com/product/offi01-es/ My guess in this case would be EC002892, as the light is not so directional as other products, such as http://www.arkoslight.com/product/shot01-es/, which is clearly a downlight.

However, there are products in between such as these: http://www.arkoslight.com/product/quad01-es/. Would this be a downlight, or a ceiling/wall luminaire? Both classes can be built-in, surface mounted, etc.

I also attach pictures.

Thanks a lot,

Roberto
Roberto Ortega 4 years ago created
Here are the pictures!

Thanks,

Roberto
Marc Habets 4 years ago created
That's a nice one ?. A discussion where even the experts always discuss and never seem to find a clear definition. @karlpappas​ do you know (from the last expert group sessions) if we can give a clear border here? I guess the truth lies as you suggest in the 'directional character', but also EC002892 has EF008157: Beam angle. Anyway, your last example for me should clearly be EC002892.
Roberto Ortega 4 years ago created
Hello,

Thanks for your reply. I just wanted to add another doubt I have run into - if I have pendant luminaires with pretty directional angles (less than 50º - http://www.arkoslight.com/en/product/holly01-es/ or http://www.arkoslight.com/en/product/scop01-es/), I don't know if they should be downlights/spotlights or pendant luminaires in ETIM. Pendant luminaires doesn't have the "EF008157 - Beam angle" feature, so in this case I think I'll stick to Downlight/floodlight and include "true" in "EF001265 - Suitable for suspended mounting". It may not be the most exact class, but this way I can inform of one of the key features... what do you think?

Regarding my first question in this thread, it would be great to know if there is a certain "beam angle" below which it can be considered a downlight/spotlight (EC001774), and above which it enters Ceiling/wall luminaire (EC002892). ?

Thanks a lot,

Roberto
Marc Habets 4 years ago created
The key issue (in my modest opinion) is not the beam angle, but if it is intended as (diffuse) general lighting or bundled lighting (to highlight/irradiate something), that also has to do with the light intensity.  The luminaire in the example I added is EV011535: Narrow beam 11-20°, but clearly is not a spotlight. Classifying your examples as Downlight/floodlight to me is the wrong choice. I understand this might sound confusing, but for me it would be EC002892, since it can be both surface mounted and suspended and it is not a typical pendant luminaire. But I would like to have some supporting comments from experts on that.
Roberto Ortega 4 years ago created
Hello Marc & Karl,

I've been taking a look at this luminaire Marc posted, and I found another picture of its application (first picture attached). This is highlighting a specific area, not diffuse lighting for me...

In the second picture, there's another example of the "Holly" luminaire I shared before, it is clearly illuminating a certain area of the table.

When you're talking about intensity, are you talking about luminous flux?

Thanks,

Roberto
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Topic started 24 August 2018 at 11:35