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Lighting Calculation 12

The document provides sample calculations for designing a lighting system for a commercial drafting room. It gives the dimensions and characteristics of the room as well as the recommended illuminance level. The calculations are meant to give an overview of the lighting design process, from selecting the recommended luminance level to designing the lighting layout. Key steps shown include determining the recommended 1000 lux illuminance level from tables, drawing a cross section of the room without a ceiling cavity, and selecting luminaire type and lamp specifications.

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Hansika Rajapaksha
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292 views1 page

Lighting Calculation 12

The document provides sample calculations for designing a lighting system for a commercial drafting room. It gives the dimensions and characteristics of the room as well as the recommended illuminance level. The calculations are meant to give an overview of the lighting design process, from selecting the recommended luminance level to designing the lighting layout. Key steps shown include determining the recommended 1000 lux illuminance level from tables, drawing a cross section of the room without a ceiling cavity, and selecting luminaire type and lamp specifications.

Uploaded by

Hansika Rajapaksha
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Sample Calculations Sample Calculations

Sample Calculation 1:
The room to be lighted is as follows:
The calculations presented using various tables and figures
are only meant to give the user of this module a general Type of building : Commercial
overview of the design of lighting system, showing individual Area/activity : Drafting/tracing paper, low contrast
steps from the selection of the recommended luminance Average age of worker : 35 years
level, to the design of lighting layout.
Demand for speed and/or accuracy : Important
Task background reflectance : 75%
Size of room : 10.0 by 13.25 meters; 2.91 m ceiling
Height of work plane : 0.91 m

Module 4 –Lighting Calculations Philippine Efficient Lighting Market Module 4 –Lighting Calculations Philippine Efficient Lighting Market
Transformation Project (PELMATP) Transformation Project (PELMATP)

Sample Calculations Sample Calculations


Solution:
Reflectance factors : Ceiling 80%, walls 50%, and floor 30%
Luminaire type : Type 2, IES Lighting Handbook Table ; 300 mm
Step 1: Determine the recommended illuminance level:
wide with two lamps
From Illuminance Table (IES Lighting Handbook) , the
Lamps : 430 mA, 40 W, 1200 mm, warm white, rapid start tubular illuminance category is F.
fluorescent lamps From the IES Lighting Handbook Table, the recommended level
Atmosphere : Clean is 1000 lux

Interval between cleaning : 12 months

Module 4 –Lighting Calculations Philippine Efficient Lighting Market Module 4 –Lighting Calculations Philippine Efficient Lighting Market
Transformation Project (PELMATP) Transformation Project (PELMATP)

Sample Calculations Sample Calculations


Step 2: Draw a cross section of the room and determine cavity
heights. Note there is no ceiling cavity.

Module 4 –Lighting Calculations Philippine Efficient Lighting Market Module 4 –Lighting Calculations Philippine Efficient Lighting Market
Transformation Project (PELMATP) Transformation Project (PELMATP)

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