About 40 years ago an engineer at Stanford University demonstrated the importance of running florescent light fixtures in a three-phase pattern where the three tubes in a fixture were connected to separate phases so as to minimizing the strobing effect. As I recall they were in the process of converting classroom lighting to this configuration. He showed me the improvement with a simple silicon photodiode connected to an oscilloscope.
Bruce, KG6OJI
ebrucehunter