Yes, certain diseases with inflammatory elements can be positively affected by red light therapy, such as psoriasis. In general, if you usually feel better in the summer, light therapy will probably help you the most during the dark part of the year. To a large extent, it provides the same effects as the sun, but without the harmful UV light.
Dele:
What are the health benefits of red light therapy?
How can I use red light therapy to improve my results in the gym?