Hip couple Dorothy and Mel Tanner began exploring Plexiglas light sculpture back in the ’60s, inventing their own avant-garde genre while freely experimenting with what’s come to be known as “new media” on the modern front: refracted light, projections, music and electronic enhancements. Mel passed away in 1993, but Dorothy, now in her nineties and still resiliently creative, remarkably continues those experiments begun decades ago at her Lumonics studio and gallery in metro Denver. The Tanners will get their due with Then & Now: A Retrospective of Light-Based Sculpture by Dorothy & Mel Tanner, an eye-popping exhibit (and their first full retrospective) opening on Friday, January 13, with a reception from 6 to 10 p.m. at the MOA Indoor Gallery, 1000 Englewood Parkway in Englewood. Then and Now runs through March 24; visit moaonline.org for details. Learn more about Dorothy Tanner and Lumonics at dorothytanner.com.