Vertical Illuminance - WELL

questions regarding the handling of DIALux evo. (features, tools, options, settings)
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Joined: Mon May 06, 2019 3:52 pm

Vertical Illuminance - WELL

Post by isamv » Mon May 06, 2019 4:00 pm

I'm trying to calculate vertical illuminance at eye level, 45cm above the desk, and when looking at the different calculation surface's types, i get completeley different results when using the 'perpendicular calculation surface' compared to the 'vertical calculation surface' , ca 350lx difference in the result. For illuminance values at eye level which one should i use then? Perpendicular or vertical? Thanks in advance,

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Joined: Wed Mar 07, 2012 3:07 pm

Re: Vertical Illuminance - WELL

Post by Csuleiman » Fri May 10, 2019 7:49 am

Hi isamv,

Perpendicular illuminance, for example, is an expression of the level of illuminance on a horizontal work plane, while vertical illuminance relates to a vertical plane. In the individual case the latter may also apply to such planes as a drawing board placed at an angle of 70°.
So in your case, you should use the perpendicular or horizontal illuminance.

Best regards,
DIAL Support Team


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