Treated by ultraviolet radiation since the early 21st century, the development of science and technology has led to the rapid advancement of artificial light therapy. UVA and UVB methods have proven to be the most effective ways to treat many types of dermatosis.

In recent years, the number of dermatosis patients has increased. Traditional medication is often difficult for patients to accept due to shortcomings such as long treatment periods, significant side effects, and easy relapse. To reduce patient discomfort, the YK-6000 series UV radiation treatment system was developed. Clinical results show it is highly effective for conditions such as leukoderma, psoriasis, and pityriasis rosea.