Abstract: An extension device is provided for use in a lamp harp assembly of the type that includes a lamp-mounted base bracket having a pair of arms that each include an approximately U-shaped cross-section wall defining a channel having a generally vertically oriented slot and a top end opening for removably receiving the bottom end of a leg of a bail to which can be mounted a shade. The device includes a pair of rigid members which each have an upper portion having a top end opening for receiving the bottom end of the bail leg. Each member further includes a lower portion extending from the upper portion and having a laterally extending peripheral retaining ring for defining an aperture into which can be inserted the base bracket arm wall. The lower portion also has a generally vertically oriented, inwardly offset retaining tab for being inserted into the open top end of the bracket arm wall to engage the wall.