The circuit shown at the panel is realized as the sections for studying the operation of the linear fluorescent lamp with connection circuit including electronic control gear and the linear LED lamp combined at one figure. Connection of the external luminaires is made via a standard socket and a key switch.
A lux meter-pulse meter and a photometric unit of transparent polycarbonate, which has a rotatable platform with an angular scale, are used for registration of the dependence of illuminance of the working surface on its angulation. Angulation is registered on the scale. Bulbs in the lamp on a flexible stem are replaced in order to determine brightness of the working surface with various light sources.