Xander Cadisch is Co-Owner of Phos and Founder of Light Tribe by Phos, working at the intersection of light, human biology, neuroscience, and the built environment.

He is the author of the international award-winning The Light Within Us, which reframes light as a biological input that shapes health, emotion, cognition, and performance, combining ancient biology with modern scientific research to explore how we design healthy environments for an indoor species.

Building on this work, Xander is developing a next-generation global framework for healthy lighting in the built environment, bringing together circadian science, photobiomodulation, neuroaesthetics, neuroarchitecture, spectral biology, and practical design application through global research, academic collaboration, and direct conversations with some of the world’s leading scientists, architects, designers, neuroscientists, and wellbeing pioneers.

He is also the creator and host of the In Light of It All, now in its third season, where internationally respected voices in science, design, and human performance help test, challenge, and refine this emerging framework in real time.

Internationally, Xander has presented his work across Europe, Asia, and North America at platforms including LEDucation, FIND, Darc Sessions, Surface Design Show, and Clerkenwell Design Week, while also lecturing master’s students in Oslo and universities across the UK.

His work also extends into policy and industry change. Xander has engaged with MPs and ministers at the House of Commons and serves on the Lighting Industry Association Government & Public Affairs Committee, helping protect the integrity of health-led, quality lighting standards within future UK legislation.

Recognised as a Forty Under 40 UK and Forty Under 40 Global lighting leader, his work and thinking have featured in House & Garden and HiddenWires.

Through Phos, he applies this philosophy to product. Built on more than 140 years of British engineering heritage, including historic precision engineering work for Rolls-Royce, Bentley, and Jaguar Land Rover, Phos creates precision lighting instruments that combine engineering excellence with biological intent. The business is a recipient of the King’s Award for Enterprise.

His core principle is simple. Light is not decoration. Light is biology. Light is a form of care.