"It is easier to buy a pair of slippers than to carpet the whole world."

Not to be too insensitve, but if your tralside acquaintance thinks hisalth is in danger because of certain lights, he should talk to (1)his doctor; (2the manufacturer, (3 the provincial legislature. Going from person to person asking that they refrain from using flashing lights seems like the last thing I would do.

I should add another (0) if you have epilepsy don't stare at strobe lights.