I converted 3 Patt 53 lanterns formerly on the circle fron at the Royal Lyceum in Edinburgh in approx 1973 I adapted the inside and put in a GX9.5 holder which took a T9 Lamp this was superseded by the T11. I also converted the Patt 83a auto lanterns in the King's edinburgh at the same time. Laterly I did the same with another Style of Patt 83 in the Edinburgh Empire the bits for these came from the Glasgow Ahambra.