Quote:
Originally Posted by OldBoy
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,[33] 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?
