With over 100 million Keystone lighting components in use since 1945, we believe that lighting should be simple, hassle-free, and transformational. Keystone, Light Made Easy. Lighting is an essential part of our lives, but to most people choosing, designing, and installing quality lighting is a complicated and frustrating endeavor. We have lots of options, including different lighting technologies, product features, and companies with whom to work. Our mission at Keystone is to change the way people think about lighting. Based in Lansdale, Pennsylvania, Keystone Technologies services customers across North America with a distribution network and sales organization around the USA.