Lumen Eclipse is a public media arts gallery located in Harvard Square, Cambridge, Massachusetts, founded to expand public awareness of local, national, and international artists. The gallery is situated on two mounted displays on the Tourism Information Kiosk, just outside the Harvard Square MBTA stop, screening motion art daily. The gallery may also be viewed on the Lumen Eclipse website.

Lumen Eclipse presents contemporary motion art in public spaces, using outdoor video displays, social venues, and the web. The gallery launched November 1, 2005, in Harvard Square. Lumen Eclipse exhibits 8 works a month, representing over 300 artists since launching in 2005. Participating artists have included: Yoko Ono, Michel Gondry, Miranda July, Max Hattler and Isaac Julien.

Lumen Eclipse also hosts intimate monthly screenings to facilitate dialog between artists and audiences. The Screenings are called "Le Peek" and are held at local social venues in Cambridge MA.