The luxmeter designed for self-illuminated surfaces ensures accuracy regardless of the spatial distribution of luminance or backlighting. It uses the cd/m² unit of measurement to quantify the brightness on the surface. Compliant with DIN 5032-7, it is Class A for maximum accuracy. The probe has a multifunction key to start, save measurements and set methods. It stores measured values and automatically records them in a text document, offering convenience in use.