;
Carlsbad Caverns, New Mexico : Grenald redesigned the entire system, using lamp color and distribution characteristics to render the cave's scale and depth. Lighting intensity was gradually reduced so visitors could adapt to the Cavern's lower levels, while lamp color brought out the natural contrasts of the stone walls. Lighting was used to alternately reinforce the immense scale of the caverns and highlight the restrictions of space. ;
Pennsylvania Avenue, Washington, D.C. : Relit the thoroughfare stretching from the
Capitol to the
White House as part of a project from 1976 to 1996, sponsored by The Pennsylvania Avenue Development Corporation. The lighting worked to bring out the significance of the boulevard that could be enjoyed by tourists and become an important destination for tourists and locals alike. ;
Boathouse Row, Philadelphia : Created evening lighting to bring out the beauty of the Victorian-era boathouses and their reflection on the
Schuylkill River. The site, once slated for destruction, is now an important Philadelphia landmark. ; Locust Walk,
University of Pennsylvania : An important component of the University of Pennsylvania's master plan to illuminate the campus at night and make it a safe and attractive destination for students. It also involves lighting the architecturally important
Furness Building. ;
Liberty Bell Pavilion, Philadelphia : This building has housed the Liberty Bell since 2004, and Grenald headed the team that designed the museum's exterior and interior areas. ;
Pennsylvania Academy of Fine Arts : An important building designed by
Frank Furness, Grenald designed lighting during the building's centennial to bring out the beauty of Furness's original designs and enhance the use of the space as a museum and school. ;
The White House, Washington, D.C. : Relit the
Oval Office and many areas of the
West Wing. ==References==