I actually feel like this is true. When I started dating my boyfriend i started noticing i would get alot of headaches when I was at his house...but my house fine. He uses LED all over the house...i use soft or clear irravecent bulbs. It's worse now that we live together and rotate houses between week and weekend...weekends, i get headaches and nosebleeds. We have had ducts cleaned, painted, replaced a ton of stuff. I am still the same...he gets some too. I just showed him this..he said we are changing lightbulbs this weekend...thanks for sharing...you helped me win me an argument 😎🤣