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Lumean Area Method 1. A room 100 ft x 300 ft requires 80 foot-candle. It is to be illuminated by duplex fluorescent lamp. The 2-T20 watt lamp has an output of 3200 lumens, maintenance factor is 0.7 and coefficient of utilization is 0.6. Calculate the number of luminaires. 2. A room 20 m by 10 m is to be illuminated by 10 lamps at an average illumination of 50 lux. If CU = 0.50 and MF = 0.83, the mean spherical candlepower of each lamp is nearest to…

Lumean Area Method 1. A room 100 ft x 300 ft requires 80 foot-candle. It is to be illuminated by duplex fluorescent lamp. The 2-T20 watt lamp has an output of 3200 lumens, maintenance factor is 0.7 and coefficient of utilization is 0.6. Calculate the number of luminaires. 2. A room 20 m by 10 m is to be illuminated by 10 lamps at an average illumination of 50 lux. If CU = 0.50 and MF = 0.83, the mean spherical candlepower of each lamp is nearest to…

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Lumean Area Method

1. A room 100 ft x 300 ft requires 80 foot-candle. It is to be illuminated by
duplex fluorescent lamp. The 2-T20 watt lamp has an output of 3200
lumens, maintenance factor is 0.7 and coefficient of utilization is 0.6.
Calculate the number of luminaires.

2. A room 20 m by 10 m is to be illuminated by 10 lamps at an average
illumination of 50 lux. If CU = 0.50 and MF = 0.83, the mean spherical
candlepower of each lamp is nearest to…

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