Keystone was born 70 years ago when 2 brothers in-law returning from World War II saw an opportunity. Fluorescent lighting was emerging, and their hometown of Philadelphia was a Hub for manufacturing this new technology. Starting in their garage the new company soon became a key ballast supplier for names like Progress, Crescent, and Seagull lighting.
When the technology from which Keystone was born started to give way to LED Keystone pivoted hard and brought their decades of experience designing and building components to finished products. Today Keystone has one of the industry’s most diverse offerings in LED lamps, modules, retrofit kits and finished fixtures in the market.
Still in the Philadelphia area, Keystone has generations of family still at work, relying on their experience and ingenuity to keep Keystone in the forefront of the lighting field.