A MIDWESTERN DOCTOR: In 1973, John Ott put full spectrum lights in two Chicago classrooms. Within a week, hyperactive first graders settled down, one boy who couldn't sit still taught himself to read, and the class later had a third as many cavities.

In 1973, John Ott put full spectrum lights in two Chicago classrooms. Within a week, hyperactive first graders settled down, one boy who couldn't sit still taught himself to read, and the class later had a third as many cavities. The schools refused to continue it. https://t.co/DbrxcJY0Cg

— A Midwestern Doctor (@MidwesternDoc) October 27, 2026