Westinghouse OV-15 70 Watt High Pressure Sodium

Here is a Westinghouse OV-15 that I purchased from a very nice collector I met who happens to live here in Florida! When I got this, it had a G.E. 480V 100 watt HPS ballast in it. I removed that and installed a Howard Industries 120V 70 watt HPS ballast, along with a 70 watt PLT brand lamp. I kept the G.E. ballast and capacitor and they are currently on display on a shelf in my bedroom.