Compact fluorescent lamp with extended cavity tube

Abstract

This present invention relates to a fluorescent lamp and, in particular, a compact fluorescent lamp or an enveloped fluorescent lamp with high surface load using new cold-end technology. The present invention includes at least one lamp tube with a cathode, stem cap and wire disposed at each end and forms a whole integral discharge cavity. A cavity tube connecting through the lamp tube is extended from at least one end of at least one lamp tube to form a light emitting zone and cold-end zone in the lamp tube. The advantages of the fluorescent lamp include: (1) best lamp working temperature can be adjusted within a wider range; (2) mercury-vapor pressure inside lamp tube can be adjusted to provide a stabilize working state; and (3) the cathode can be rapidly started, thus overcoming the slow starting problem of existing fluorescent lamps with amalgam.

Dependencies are inferred from the claim text.