But AFAIK LED brightness is usually controlled by pulse-width modulation, which is essentially adding flicker. There are people with flicker sensitivity that h

But AFAIK LED brightness is usually controlled by pulse-width modulation, which is essentially adding flicker. There are people with flicker sensitivity that have headaches when exposed to flickering light. A link to a HN discussion that touched the problem of PWM and flicker in the comments: https://news.ycombinator.com/item?id=13330611 https://news.ycombinator.com/item?id=13330611