Light is fundamental to how we perceive space. Beyond making things visible, it shapes our understanding of color, material, depth, and spatial organization through qualities such as illuminance, luminance, temperature, direction, density, and distribution. This project examines how light actively constructs visual experience rather than merely revealing form. Research in perception shows that our eyes do not register brightness as a fixed property; instead, brightness is interpreted through adaptation, surrounding context, and spatial cues. As Heeger notes, retinal responses depend on context rather than on isolated light intensity alone. Because of this, we tend to perceive objects as having stable brightness even under changing lighting conditions, a phenomenon explained by light adaptation, brightness constancy, and simultaneous brightness contrast. These mechanisms show that perception is always relational: what we see depends not only on the object itself, but also on the luminous environment around it.

The project also investigates how these perceptual effects influence color and spatial understanding. Variations in illuminance, reflectance, and surrounding luminance can alter how saturated or desaturated colors appear, revealing that color perception is shaped by low-level visual processing and by the brightness of adjacent surfaces. In this way, our visual system is not neutral but biased by contrast and environmental context. Building on this, the project considers how spatial organization is informed by what Kitamura and Sawayama describe as “lightness perception on articulated surrounds.” Their concept of the articulation effect shows that adding varied luminance patterns around a target changes how its lightness is perceived, which in turn affects how we read spatial relationships and group visual elements. Together, these ideas frame light as a design tool that can influence not only atmosphere, but also how people interpret form, color, and the structure of space itself.