Independent research has conclusively shown that access to natural Daylight enhances mental and physical well-being, and boosts concentration and energy levels.
In fact, Daylight is the primary external environmental influence on the way we feel every day, stimulating the body’s production of serotonin which is vital to our mental state.
Check out the Sun and the Body study to see the benefits of sunlight on the human body:
https://www.encyclopedia.com/medicine/encyclopedias-almanacs-transcripts-and-maps/sun-and-body