Candace “Candy” Kling, 67, whose Alexandria-based architectural-lighting design company had worked on more than 2,500 projects around the world, died March 26 at the Virginia Hospital Center in Arlington County.

The cause was a heart attack, said her partner, Deborah Ross.

Ms. Kling’s firm, now known as C.M. Kling and Associates, received a GE Lighting award in 1991 for its work on the main facade of Washington National Cathedral. The company’s other projects included the Walter E. Washington Convention Center in Washington and BC Place Stadium in Vancouver, B.C.

Candace Mary Kling was a Philadelphia native. Her involvement in stage lighting in high school led to an internship in New York with Jean Rosenthal, the lighting designer who worked on Broadway shows of the 1950s and ‘60s, including “West Side Story” and “Fiddler on the Roof.” Ms. Kling founded her company in 1980.

In 2010, Ms. Kling was inducted into the International Association of Lighting Designers college of fellows and served as a judge for the IALD International Lighting Design Awards. She was on the board of Marymount University’s interior design school. She was a charter member of the National Museum of Women in the Arts in the District.

Survivors include her partner of 27 years, Deborah Ross of Alexandria; a sister; and two brothers.

— Adam Bernstein