A very strange lamp, these white son lamps are very different from ordinary sodium lamps. They use dedicated control gear and have a 2 pin base
They produce a very “warm” light mainly white but with strong yellow and orange overtones.
They are most often seen in cafes and restaurants where a relaxed mood is required.
We have had problems with the control gear which in some installations has been a bit flaky.
Unfortunately you cannot change the orange light from a regular Sodium Lamp to white by using one of these lamps because they use different control gear. If you want to change to white light you are now better off going for an LED Corn Light and either removing or simply bypassing the existing control gear.