Shivelight Space

Biophilic Lighting Design for Indoor ´‘Forest Bathing’

Abstract

In an era of rapid urbanisation and global environmental crisis, architecture must move beyond sustainability to cultivate environments that regenerate ecological systems and nurture human well-being. Biophilic design, a field that promotes the integration of nature into the built environment, has gained prominence in addressing this challenge. Central to biophilic architecture is the role of natural light. However, despite its importance, the treatment of light in biophilic design remains superficial. Most biophilic frameworks reduce light to general references of “daylight” or “sunlight,” with little exploration of its qualitative, poetic, or phenomenological dimensions. This paper addresses this gap by developing a new theoretical and practical framework for biophilic light, grounded in the forest environment and expressed through a phenomenon known as shivelight.

Coined by poet Gerard Manley Hopkins in 1888, the term shivelight refers to the narrow lances of sunlight that pierce through a forest canopy. Unlike generic notions of daylight, shivelight is highly specific, tactile, and emotionally charged - it is light that is felt as much as seen. In this paper, shivelight is presented as a spatial and sensory phenomenon that embodies the layered, filtered, and dynamic qualities of light found in forest ecosystems. Through an interdisciplinary theoretical framework drawing on poetry, ecology, phenomenology, and Japanese philosophy, the study proposes 'forest light' as a distinct typology of biophilic light - a mode of lighting design capable of producing immersive, restorative, and spiritually resonant indoor environments.

The paper is structured around three interconnected theoretical pillars. The first draws from poetic and cultural framings of forest light, particularly shivelight and the Japanese term komorebi, which describes the dappled light filtering through leaves. These linguistic and metaphorical constructs offer a way of thinking about light that foregrounds its emotional and aesthetic power. The second pillar is the Japanese practice of Shinrin-Yoku, or forest bathing, a therapeutic immersion in forest atmospheres that has been shown to reduce stress, boost immunity, and improve mood. The third pillar is phenomenology,  which emphasises the role of embodied perception in architectural experience. From this perspective, light is not merely visual but tactile, temporal, and atmospheric; it reveals space, evokes memory, and invites contemplation.

Together, these theories form the foundation of biophilic phenomenology, a conceptual model introduced in this paper. Biophilic phenomenology proposes that the restorative qualities of nature are not only biological or evolutionary, but also deeply sensory, embodied, and affective. It argues that architecture must engage light not simply as a technical resource, but as a medium through which nature is felt, remembered, and reimagined.

The paper develops a practical design methodology titled the Shivelight Pattern Language. This design toolkit identifies key typologies of forest light - shivelight (beams), komorebi (dappled patterns), ambient glow, and deep shadow - and offers spatial and tectonic strategies for emulating them indoors through two primary approaches: forming light, which uses elements such as skylights, brise soleils, and pinhole openings to sculpt light patterns; and filtering light, which employs vegetation, diffusers, and layered materials to scatter and soften illumination. These methods are rooted in ecological biomimicry and phenomenological spatial design, aiming to replicate the rhythm, complexity, and emotional impact of forest light.

The research is supported by a critical review of existing biophilic design frameworks (Kellert 2008, 2018; Browning & Ryan 2020; Zong et al. 2022), which reveals a lack of nuance and implementation strategies for lighting. While these models recognise natural light as important, none address how it might be shaped to evoke specific ecological atmospheres. 

Finally, the paper presents illustrative case studies across typologies to demonstrate how shivelight principles can be integrated into real-world design. These examples highlight the potential for light to serve as both a poetic and pragmatic strategy for regenerative architecture. In dense urban contexts where access to nature is limited, Shivelight Spaces offer a way to bring the forest indoors - not as metaphor, but as atmosphere.

Ultimately, this research positions forest light as a central agent in biophilic architectural design. By translating its ephemeral qualities into spatial language, Shivelight Space becomes a tool for sensory reconnection - to place, to memory, and to the more-than-human world.