Design of the lighting system : lumen method - Printable Version

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Design of the lighting system : lumen method - harshita - 06-05-2019

Design of the lighting system : lumen method
This method gives rough and reasonable estimates of the lamps / luminaires needed. It is used in areas where a uniform light intensity is required for the work area. Illumination level required at the work surface is obtained by,

E = illumination level required at the work surface
A = total area of the plane where the work is done.
Φrec = flux of light received on the working surface.
To estimate the average illuminance of the installation at a particular stage in its life. This is achieved by using the following formula:

Em = Maintained illuminance (lux)
ϕin = Initial luminous flux of the light source (lumen)
n = Number of lamps per luminaire
N = Number of luminaires
A = Area to be illuminated (m2)
UF = Utilization factor for the luminaire in the room
MF = Maintenance factor


To know more about illumination read .... http://frontdesk.co.in/building-science/illumination-in-architecture/

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