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Light Sources, Second Edition, 2nd Edition
book

Light Sources, Second Edition, 2nd Edition

by Spiros Kitsinelis, Spyridon Kitsinelis
May 2015
Intermediate to advanced content levelIntermediate to advanced
295 pages
8h 16m
English
CRC Press
Content preview from Light Sources, Second Edition, 2nd Edition
208 Light Sources and Health
9.3 Flicker and Health Effects
Flicker is the modulation of a lamp’s light output mainly caused by uctuations
of the mains voltage supply. The mains frequency is 60 Hz in the United States
(50Hz in Europe) causing a icker at 120 Hz (100 Hz in Europe) in the lamp’s
output. Flicker is not perceptible at this frequency but it can still affect people.
All types of lamps suffer from icker (even LEDs that have a DC mode of opera-
tion) but people seemed to dislike, in particular, the icker of uorescent lamps
operated with magnetic ballasts at that mains frequency. It is not uncommon to
hear people in ofces comp ...
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Publisher Resources

ISBN: 9781482243673