Nope. Let me explain.
The manufacture in 1958 first started of as A-24 Zakłady Sprzętu Instalacyjnego in Gostynin. They made electric installation equiments at the time, like connectors, sockets, and other stuff in the type. At 1961, they started to make ballasts for HPMV, fluorescent, and other discharge bulbs, instead of the electrical equipments. At 1963, they chnaged their manufacture's name to Elgo Gostynin, and continued making the ballasts I believe. In 1972, they incorporated with another manufacture named Polam I believe. By 1978, their manufacture name was changed again, and renamed to Polam Gostynin (reasonable to the manufacture they incorporated with), and designed the first HPS streetlight in Poland, the OUS 400. From that time they started to make streetlights. From 1985, their streetlights were started to be stamped by a new logo, called Polamp. However, as of, the manufacture's name stayed the same. And in the same year, they made the last fixture before in 1990, their manufacture NAME was again renamed to Elgo Lighting. After the rename, they still continued the OUS / OUR 400 fixtures. At the time when the name was Elgo, they made many fixtures, such as the XXXd series in 1992, XXXa series in 1995, XXXe and XXXc series in 1997, and the Acron series in 2008, and many other. At the early 2010s, they started to make LED fixtures of different kinds, some flat, some in HPS shape, and even some in SOX shape like I mentioned. At early 2010s, some HPS fixtures were still made and some were new. In 2016, the manufacture I believe bankrupted and had to close down forever and ever...
And that's the story.