The productivity and well-being of employees are strongly influenced by lighting. Office lights must be clear enough to perform work in, but not too bright in order to cause discomfort. The UGR value portrays the number of connections that are illuminated by a lamp. Because of this, the UGR value is essential for offices, schools, and study rooms. In offices and schools, the UGR value should be <19, while in public spaces, it should generally be <22.