傳統鎮流器是magnetic低頻鎮流器，現代鎮流器都是PFC集成電路控製的高頻鎮流器，

傳統鎮流器是低頻鎮流器，現代鎮流器都是PFC集成電路控製的高頻鎮流器，
http://www.ccohs.ca/oshanswers/ergonomics/lighting_flicker.html
Are there any health effects associated with light flicker?
Although humans cannot see fluorescent lights flicker, the sensory system in some individuals can somehow detect the flicker. Ever since fluorescent lighting was introduced in workplaces, there have been complaints about headaches, eye strain and general eye discomfort. These complaints have been associated with the light flicker from fluorescent lights. When compared to regular fluorescent lights with magnetic ballasts, the use of high frequency electronic ballasts (20,000 Hz or higher) in fluorescent lights resulted in more than a 50% drop in complaints of eye strain and headaches. There tended to be fewer complaints of headaches among workers on higher floors compared to those closer to ground level; that is, workers exposed to more natural light experienced fewer health effects. [ Fluorescent lighting, headaches and eye-strain. A. J. Wilkins, I. Nimmo-Smith, I., A. Slater & L. Bedocs. Lighting Research and Technology, 1989. Vol. 21, 11-18]