Tubular light source having overwind

摘要

Embodiments of the present invention generally relate to a tubular lamp with a coiled filament having an overwind wrapped around the coil. In one embodiment, the tubular lamp has a coiled coil filament, and the coiled coil has an overwind wrapped around the coiled coil.

主权项

1. A tubular lamp, comprising:
a tubular envelope having a first end and a second end; a coiled filament having a first diameter, the coiled filament extending from the first end to the second end of the tubular envelope, wherein the coiled filament has an overwind having a second diameter and a pitch ratio between about 1.1 and about 2.0, and wherein the coiled filament comprises a coiled coil; and a ratio of the first diameter to the second diameter ranging from about 3:1 to about 15:1.