COMPACT FLUORESCENT LAMP WITH COIL-FORM LAMP ENVELOPE

摘要

PROBLEM TO BE SOLVED: To provide a compact fluorescent lamp capable of obtaining light distribution similar to that of the conventional A series incandescent lamp. SOLUTION: A lamp envelope 32 is formed with a tube material wound in a coil shape so that the contours become hemispherical. The top part of the lamp envelope is formed in a tapered shape inward. The coil-shaped lamp envelope is formed as double helix structure. By the open helix structure of the coil-shaped lamp envelope, a space in which light generated from the inside of the coil-shaped lamp envelope passes through the open helical structure is obtained, and the loss of light is minimized.