3.20. The data of Table 3.6 suggests that high pressure sodium lighting has the highest efficacy and illuminance. Does it have any disadvantages? Table 3.6. Properties of types of electric lamps [18]. Туре Illuminance (lm) Power Efficacy Life expectancy (W) (lm/W) (h) Tungsten GLS 1,200 100 12 1,000 Tungsten halogen 50,000 2,000 25 4,000 Compact fluorescent 1,200 28 43 8,000 Fluorescent tube 4,500 70 64 10,000 High frequency tube 5,000 62 80 10,000 High pressure sodium 25,000 280 90 12,000
3.20. The data of Table 3.6 suggests that high pressure sodium lighting has the highest efficacy and illuminance. Does it have any disadvantages? Table 3.6. Properties of types of electric lamps [18]. Туре Illuminance (lm) Power Efficacy Life expectancy (W) (lm/W) (h) Tungsten GLS 1,200 100 12 1,000 Tungsten halogen 50,000 2,000 25 4,000 Compact fluorescent 1,200 28 43 8,000 Fluorescent tube 4,500 70 64 10,000 High frequency tube 5,000 62 80 10,000 High pressure sodium 25,000 280 90 12,000
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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Question
![3.20.
The data of Table 3.6 suggests that high pressure sodium lighting has the
highest efficacy and illuminance. Does it have any disadvantages?
Table 3.6.
Properties of types of electric lamps [18].
Туре
Illuminance
(lm)
Power
Efficacy Life expectancy
(W)
(lm/W)
(h)
Tungsten GLS
1,200
100
12
1,000
Tungsten halogen
50,000
2,000
25
4,000
Compact fluorescent
1,200
28
43
8,000
Fluorescent tube
4,500
70
64
10,000
High frequency tube
5,000
62
80
10,000
High pressure sodium
25,000
280
90
12,000](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fce0afc3b-3e57-4487-b673-cf6f07e8890b%2F226d0bc2-ae96-47fc-aa28-f7161a65cd3a%2Fdn4uq4_processed.jpeg&w=3840&q=75)
Transcribed Image Text:3.20.
The data of Table 3.6 suggests that high pressure sodium lighting has the
highest efficacy and illuminance. Does it have any disadvantages?
Table 3.6.
Properties of types of electric lamps [18].
Туре
Illuminance
(lm)
Power
Efficacy Life expectancy
(W)
(lm/W)
(h)
Tungsten GLS
1,200
100
12
1,000
Tungsten halogen
50,000
2,000
25
4,000
Compact fluorescent
1,200
28
43
8,000
Fluorescent tube
4,500
70
64
10,000
High frequency tube
5,000
62
80
10,000
High pressure sodium
25,000
280
90
12,000
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