LED lights emit a significant amount of blue light that can disrupt sleeping habits and lead to eye illness over time.
LED lights do not emit near-infrared radiation, the good radiation which the sun emits.
The benefits of near-infrared radiation are numerous. It can easily permeate through the skin profoundly and clothes. In addition, the retinal cells are primed to repair and regenerate when this type of light strikes the retina. This is impossible to achieve with LED lights. As a result, they should not be the sole source of light during the day.
Another issue with LED lights is the significant amount of blue light they emit. In the visible spectrum, blue light has the shortest wavelength. It has been thoroughly investigated and widely acknowledged as hazardous to the eyes.