Incorporating Human-Centric Lighting (HCL) into ceilings can have a profound impact on the day-to-day lives of occupants. When artificial light is synchronised with our natural circadian rhythms it can lead to improved sleep, mood regulation, and overall wellbeing. In this whitepaper, we illuminate the often-neglected physiological and psychological effects of lighting and look at how HCL systems can be seamlessly integrated into metal ceiling structures without compromising on design.