DEMONA is a Daylighting Testbed for field measurements purposes. This chamber resembles a typical office room, equipped with a unilateral façade reaching a 62% window-to-wall ratio. Inside the chamber, lux-meter arrays and temperature sensors are positioned for lighting and thermal monitoring. At the moment, experimental activities in DEMONA include validation of real-time daylighting simulation based on HDR imaging techniques and automation of external Venetian blinds.