1. 1
Physical Agents: Effects, Evaluation and
Control PUBH 5620
Project #6
William Bryant-Bey, Muhamad Younes, Gregory Heldt, Rhiley Roberts
Dr. Akbar
March 27, 2013

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TABLE OF CONTENTS Page
Introduction 3
Results 3
Map 1 3
Table 1 4
Discussion 4
Conclusion 4
References 5

3. 3
Introduction
A lux meter was used to measure and tabulate illumination levels at 20 locations inside a
lab where technicians work is perform, also measurements were taken at 3 locations in the
adjacent corridor. The measurements were taken to determine how much lighting is spread out
at each location while the workers’ are reading books and performing fine-task visual activities.
Results gathered from the lab will be compared against the recommended limits to see if the
workers are receiving enough lighting to perform their job.
Results
Map 1 below demonstrates the layout of the lab were the illumination measurements
were taken and recorded in lux. The dimensions of the lab are L 8.30 m X W 4.47 m X 0.66 with
a total surface area of 91.05 m2 and volume of 95.93m3.
Sinks
1
21
2
50
3
50
4
38
5
133
6
123
7
203
8
242
9
445
10
510
11
517
12
466
13
740
14
847
15
850
16
710
17
511
18
578
19
678
20
406
Hallway
116
Hallway
92
Hallway
149
Lab instruction
Table 1 below shows the recommended light level in different work spaces. Depending on the
activity the light level is more common in the range 500 – 1000 lux. The light level may
approach 1500 – 2000 lux for precision and detailed works. Based on the job duties of the
technician workers of reading books and performing fine-task visual activities the lighting at
each area should be in the range 2000 – 5000 lux. Every work location in the lab was under the
recommended minimum 2000 lux. The measurements that were taken at the adjacent corridor
were in the range of the recommended 50 – 100 lux.

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Discussion
The map shows different illumination levels in the area of the lab where workers will be
performing their activities this information is used to identify where workers are not receiving
enough illuminations in their workplace. When workers are exposed to poor lighting it may
affect their performance and health as poor visibility increases the chance of errors being made.
Workers will be unable to recognize hazards. Poor illumination can increase visual strain and
discomfort. When lighting is poor workers may develop poor posture from leaning over and
performing their task which may result in muscular-skeletal strain. To increase the illumination
in the lab each workstations should be provided with localized lighting, such as a fluorescent
lamp because it have good color rendering and good vision. The lighting system in the lab should
be cleaned and bulb should be replaced regularly to improve the efficiency of the lights.
Conclusion
In conclusion, the purpose of measuring illumination levels is to help reduce safety and
health hazard in the workplace due to bad lighting. Workers’ who are exposed to bad lighting
may feel sluggish and tired, which may affect their quality of work. If workers’ are provided
with the accurate amount of lighting to perform their work they will be productive, be more
accurate and perform at a high standard.

5. 5
Reference
Richman, Eric E. “Requirements for Lighting:”
Levelhttp://www.wbdg.org/pdfs/usace_lightinglevel.pdf
Tiedeman,Jeff.“AnErgonomicPrimeronOffice Lighting:”-
http://www.statefundca.com/pdf/sftyOfficeLighting.pdf

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