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dg1961
Active Contributor

Join Date: Feb 2010
Posts: 16

Illumination Requirements

02/10/2010 9:22 AM

Can anybody tell me the formula for Calculating No. of Light Fittings inside & outside of an Industrial Plant.
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redfred
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Engineering Fields - Electrical Engineering - Been there, done that. Engineering Fields - Control Engineering - New Member

Join Date: Dec 2008
Location: Long Island NY
Posts: 15600
Good Answers: 981
#1

Re: Illumination

02/10/2010 10:02 AM

Work with the designer of the plant and/or your lighting fixture vendor. They are supposed to know all of the critical attributes required to construct your plant's lighting concerns. Here is a partial list of concerns:

  • Lux level minimum for local safety code and for tasks specific to this plant
  • Height from fixtures to surfaces
  • Explosive atmosphere
  • Weather exposure
  • Backup safety lighting
  • Color temperature concerns for tasks

Your designer will also have a grasp of simple optics intensity calculations, like the inverse squared law.

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msamad
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Join Date: Feb 2009
Location: Houston, USA
Posts: 946
Good Answers: 244
#2
In reply to #1

Re: Illumination

02/10/2010 12:31 PM

Use this formual:

Average Maintained Illumination (Foot-candles) = (Lamps/Fixture x Lumens/Lamp x No. of Fixtures x Coefficient of Utilization x Light Loss Factor) ÷ Area in Square Feet

This website will be additional help:

http://www.lightsearch.com/resources/lightguides/formulas.html

- MS

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Anonymous Poster
#3

Re: Illumination Requirements

02/10/2010 10:47 PM

The Illuminating Engineering Society, IES, or the IESNA.

The IES handbook
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NoEngr
Associate

Join Date: Nov 2007
Posts: 50
#4

Re: Illumination Requirements

02/11/2010 9:04 AM

www.visuallightingsoftware.com
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