On sustainability: “While we feel a sense of responsibility, we aren’t motivated by a grudging sense of duty or ideology, but rather by a general sense of wonder in the world. We try to instill that sense of amazement through our projects—the idea that sustainable design could mean a moonlit walk in the park.”

Emily: How did the lunar streetlight project come to be? What issues were you hoping to address? What design “problems” does the project propose to solve?

Anton Willis: The lunar-resonant streetlight project began as an offshoot of my architecture masters thesis at UC Berkeley. My thesis interest and research concerned lunar architecture—as an alternative to the countless solar-oriented buildings, ancient and contemporary. The project addresses a couple of issues: the energy wasted by unnecessary outdoor lighting, and the light pollution this creates. I grew up in a place with very pristine and
spectacular night skies, so I’m fairly attuned to light pollution—many people in urban areas never realize what they’re missing.

Kate Lydon: Beyond saving energy, the lunar-resonant streetlights are about rekindling a connection to nature in dense urban environments. As a collective, we’re interested in reintroducing a sense of wonder for the natural world–as a way to encourage respect for it. Our approach is resolutely interdisciplinary and our projects, which range from buildings to books, cross scales. Christina Seely, the third member of Civil Twilight, is also working on a parallel project, Lux, photographing the artificial glow produced by major cities, as seen on a NASA map of the world at night.

Emily: In terms of energy/technology, how do the lights work, how are they powered, how do you see them being integrated into existing urban contexts?

AW: We’re developing ways to retrofit existing streetlight fixtures, by simply plugging in new electronics. Dimmable white LEDs replace the standard yellow sodium bulbs, an ultrasensitive photosensor replaces the current twilight-activated photocells, and a microprocessor dimming control connects the two. So when there is ambient moonlight, the light senses it directly and dims down. It reacts to both lunar phases and cloud-cover or other light-changing conditions.

KL: Our plan for implementation is two-tiered. We’re interested in doing custom installations—in parks, at places with a didactic mission such as science museums, and as part of energy-conscious developments. The installations would be opportunities to promote nighttime activities at these sites, which might arrange programming, such as full moon walks, to coincide with the lunar cycle.

AW: In the longer term, we see cities retrofitting existing light grids incrementally. We imagine different planned lighting zones for cities—nighttime commercial areas might remain more brightly lit, while residential areas convert to lunar-resonance. We are also interested in packaging lunar-resonant technology with other green systems, such as integrated solar lights which could be net power generators rather than consumers—this would also bring in nice a solar/lunar duality.

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