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15-12-11, 09:53 AM
Join Date: Feb 2011
Originally Posted by
Fluorescent lamps using a magnetic mains frequency ballast do not give out a steady light; instead, they flicker at twice the supply frequency. This results in fluctuations not only with light output but color temperature as well, which may pose problems for photography and people who are sensitive to the flicker.
Living up to your name; OldBoy.
Modern fluorescent fittings (i.e.20 or so years) are all high frequency luminaires with electronic ballasts. These typically oscillate at around 20kHz which is a little faster that the supply frequency of 50Hz (UK) and 60Hz (USA), and the reason flicker is no longer an issue. They offer many other advantages; quick-start, soft-start, much increased tube life and, in many instances allowing the lamps to be dimmed.
I prepared a 40-page dissertation on this subject for expert testimony in court case about 10 years ago. I think I can find it if anyone want a copy?
The day you think you've found perfection is the day you stop looking, then someone else will find it and move in front of you.
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