Focus on this artwork and analyze the Design.
Pillar of Fire is a 16 feet (4.9 m) high illuminated glass sculpture in the shape of a slender column which represents the pillar of fire that guided the Israelites at night.   The glass weighs 2,000 pounds and is rigidly post-tensioned to a durable glass and steel rod placing the column under 15,000 pounds of pressure.  The column is composed of 370 egg-shaped layers of float glass with unpolished edges that reflects natural light and is illuminated from within.  The glasses ever-changing lights responds to changing atmospheric and lighting conditions throughout the day.  An internal and external programmable lighting system creates the illumination.  The color design at night is an abstraction of the rainbow flag, a symbol of LGBT pride.  A plaque on the sculpture's concrete base says the artwork is dedicated to "Whitman-Walker Clinic and the many health care workers who served the LGBT community in this building from 1987 to 2008, the early years of the pandemic."
Israelites rainbow flag post-tensioned float glass LGBT pillar of fire Whitman-Walker Clinic