hi Russ, I would be very interested if you turn up any results on flourescent tubes emitting mercury.
It doesnt sound logical and yet I have always noticed since childhood that they made me feel ill.
The migraine connection is probably the frequency, flickering not visible in normal conditions ,interfering with brain patterns and causing mini electical storms as in epilepsy.
But if they emit mercury ,well that would add another interesting dimension ...
Susan
Hastings UK