This Circadian Human Centric Lighting Zone Controller for Zigbee Tunable White Light Fittings has zigbee wireless with microprocessor memory real time clock and bluetooth link to ROBUS HUMANITAS app. With three 24 hour circadian lighting programmes four CCT scene sets and on/off function it delivers continuous programmes of gradually changing CCT and dimming white light with programmes available for different building use models and functions and does not require connection to the building's data network or Wi-Fi. This fitting provides room-by-room zone control of lighting or multi-zone control within a space which is hihgly beneficial in offices schools hospitals care homes and shift or 24-hour workplaces. Compatible with all future Zigbee-equipped HUMANITAS range light fittings from ROBUS