Lighting Products and Lighting Projects Design Relio Ultra-high CRI Usb Lamp by Marco Bozzola & Roman Radaelli Relio is the smallest and most powerful Usb light on the market, and the only one to emit light with ultra-high color rendering index (Cri 92-96). Designed, produced and sold by three 25yr-old Italian guys. Sized at just 35mm, it's the most portable package they were able to conceive: powered by ubiquitous USB, pocketable, rugged, with a tripod socket on the bottom to be mounted everywhere. Two swappable TIR optics provide a perfect, artefacts-free beam. Aimed at professionals, it's made in Italy from a solid aluminium block, hand-sanded and hand-assembled with maniacal precision.