He is credited as one of the key figures that galvanized the Light and Space movement onto the world stage, alongside his contemporaries Robert Irwin, Doug Wheeler, and Larry Bell.

[2] He also produced paintings, including a series that depicts luminous aerial views of the city lights stretching across the Los Angeles basin.

He was commissioned to paint a large mural for the Walt Disney Concert Hall in Los Angeles.

[3] Alexander's art appears in the films Erin Brockovich, Terminator 3: Rise of the Machines and Shopgirl.

[6] A portrait of Alexander by Isherwood's longtime partner Don Bachardy has been displayed at the Laguna Art Museum.

[7] In October 2011, the Craig Krull Gallery exhibited a survey of Alexander's work, including paintings and sculptures from 1970 to 2009[8] in conjunction with Pacific Standard Time.

Alexander was exhibited in Pacific Standard Time museum shows as well, including "Civic Virtue: The Impact of the Los Angeles Municipal Art Gallery and the Watts Towers Arts Center", organized by the Los Angeles Department of Cultural Affairs, "Phenomenal: California Light and Space" at the Museum of Contemporary Art San Diego, and "Pacific Standard Time: Crosscurrents in L.A.