I've noticed (varying degrees of: thankfully very few people get migraines) the same effect with hundreds of co-workers and employees.

A few times for late shifts in various businesses I've convinced the execs to shut off the fluorescents and I cannot describe the wave of relaxation that hits almost everyone.

It's so much worse also with the combo of 60Hz monitors and 60Hz AC power.

my primary alertness / relax goto these days was wholly unplanned -- swapped out a morning nasal saline in lieu of flonase to eliminate yet another medication, and turns out it also boosts alertness / relaxes -- so now just do morning and night &/or if needed during day plus sinuses way more clear in morning

* is pure OTC saline -- not any of that other stuff people use for hangovers, etc.