Hi
I feel weak when I go into large shops.Most of the time the sheer size of the place is overwhelming for me...
The fluorescent lights could be a factor for sure.I just read today about mercury in the lightbulbs,I have 2 of those "eco-green energy daylight bulbs"are they really bad news?
There are other factors though in shopping centres &busy areas such as currents of electricity,WI-FI and all of that...

It all makes me want to go &live in a remote cave somewhere
Don't tell me caves are actually made from something deadly... just joking.It's better to be informed.
A weary Sunflower