Compact fluorescent lamp

摘要

Disclosed is a compact fluorescent lamp which comprises an airtight outer bulb filled with a rare gas and mercury; inner tube means provided within the outer bulb, said means having opening to a space of the inside of the outer bulb, and a coating formed onto at least one of an inner surface of said outer bulb and an outer surface of said inner tube means, said coating being so transparent as substantially not to scater visible rays and which consists of at least one material of an oxide and a phosphate. A compact fluorescent lamp mostly in the electric bulb shape of the present invention has been remarkably improved in the so-called lumen output maintenance without lowering of the initial lumen output.