Attn. Mitch Rezman
Fluorescent lights.
The recent post here on Vit. D led me to more research. It appears most if not all of the Windy City Full Spectrum lights have simple magnetic ballasts, producing visible flicker. This is proven for chickens and assumed for the likely better eyes of psittacines with their mainly flying lifestyle.
High-frequency electronic ballasts are now standard for indoor fluorescents where human health is a consideration as the high-frequency flicker is far faster than our visual system can perceive. https://en.wikipedia.org/wiki/Electrical_ballast>Electronic Ballasts) Commonly about 3500 Hz in Compact Fluorescent Lights. HF ballasts are now competitive with previous mains rate (120Hz) magnetic ballasts products and are offered in full spectrum phosphors lights.
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