alt Hacker NewsOr as SCP calls them, cognitohazards.
Also relevant: <https://www.quantamagazine.org/a-math-theory-for-why-people-...>
My understanding is that those who work with the mentally handicapped use bright lights and other stimuli to soothe and control them. It is also my understanding that the autistic are stimulated by vibrant colors (coughcoughMy Little Ponycoughcough).
Who is to say that the rest of us are not also vulnerable to such controlling stimuli?
Bright lights in particular, I'm thinking: yes, normal people do find sunbathing relaxing.