Light therapy is not about producing Vitamin D, it's about modifying circadian rhythms using bright light, which people often don't get enough during the winter

Light therapy is not about producing Vitamin D, it's about modifying circadian rhythms using bright light, which people often don't get enough during the winter. Generally, light therapy does not use UV. https://www.mayoclinic.org/tests-procedures/light-therapy/about/pac-20384604 https://www.mayoclinic.org/tests-procedures/light-therapy/ab...