The Ketra D3 is a new construction recessed luminaire designed for the professional spec-grade market. Appropriate for both residential and commercial use, the D3 was Ketra’s first luminaire other than a lamp or linear cove light, so a thorough assessment of the market was required.

A comprehensive primary user market research effort - including interviews with Lighting Designers, Specifiers, Dealers and Installers - led to a set of must-have features, such as a shallow overall depth to maximize ceiling heights, toolless adjustability with both tilt and rotation locks for ease of hot-aiming, and field serviceable optics and electronics for future compatibility.

Combining all of these functions in a low-profile housing was a challenge that the design team eagerly accepted and delivered on. During development, a formative glare study was conducted to assess perceived brightness against discomfort and disability glare and drive emitter location relative to exit aperture. A summative ergonomic study was also administered to ensure that all components could be accessed and serviced after installation.

Project Roles:  Market Requirements Identification, Spec Definition, Usability Lead, Design Management

Year: 2016