BASE FOR LOW PRESSURE DISCHARGE LAMPS

A lamp base (13) in combination with a low pressure discharge lamp is provided. The low pressure discharge lamp comprises a glass envelope (1) which has an end portion and an axis (3). A stem (5) is melted into the end portion of the envelope in a gas-tight manner in order to form a seal region (11). The stem is mounted with an electrode and includes a current in-lead which is connected to the electrode. The lamp base comprises a metallic base shell (15) which is fitted to the seal region (11). A resilient insert (17) is disposed substantially in the base shell. Said resilient insert embraces the seal region at least partly, and fits resiliently to an interior surface of the base shell. Said insert as means suitable for positioning the lamp base in cooperation with further means formed on the surface of the seal region. The base shell has an end portion closed at least partly by an insulator piece 23) which embeds a base stud (25) made of metal. The base stud is connected to the current in-lead (9).