Light intensity is a decisive factor for productivity, well-being and health, especially in the workplace. Too bright light sources dazzle, too dark sources can lead to concentration disorders and headaches. With the Testo 545 Luxmeter you measure the illumination of all common light sources - quickly, easily and accurately. The measuring device is compatible with almost all commercial LEDs and thus ensures a wide range of applications. As the luxmeter automatically calculates the average time and point value, you see all the important information at a glance. The Testo 545 is perfectly complemented by the Testo Smart App. It not only allows you to configure the measuring device, display and record measurement values as well as document in a particularly comfortable way. The app also turns your smartphone into a second screen.