A 40 W linear fluorescent lamp that consumes 36 W, including the ballast and emits 3,400 lm. Determine the luminous efficacy. a.94.44 lm/W b.48.57 lm/W c.44.74 lm/W d.None of the above e.85 lm/W
A 40 W linear fluorescent lamp that consumes 36 W, including the ballast and emits 3,400 lm. Determine the luminous efficacy. a.94.44 lm/W b.48.57 lm/W c.44.74 lm/W d.None of the above e.85 lm/W
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter25: Surge, Spike, And Lightning Protection
Section: Chapter Questions
Problem 4RQ: If a voltage spike lasts for 1.5 nanoseconds, what is the frequency of the spike?
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A 40 W linear fluorescent lamp that consumes 36 W, including the ballast and emits 3,400 lm. Determine the luminous efficacy.
a.94.44 lm/W
b.48.57 lm/W
c.44.74 lm/W
d.None of the above
e.85 lm/W
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