As lighting technology improves, one only need look to the past to find the way to the future. Today, we’ll do just that with Keystone Technologies. Keystone Technologies was founded in 1945 by Harold Fox and Marvin Spielman, a pair of entrepreneurial brothers-in-law returning home to Philadelphia from serving in World War II. At that time, it was fluorescent lights that were coming to the forefront as they were more energy efficient than incandescent. Keystone quickly rose through the ranks of the lighting industry’s key fixture manufacturers, many of whom were located in Philly, and became a strategic supplier of ballast and transformer needs via great products and customer service.