T8 fluorescent lamp

Details T8 fluorescent lamp T8 fluorescent lamp

2008-02-27

2010-11-16

Patel, Ashok (Department: 2889)

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

C313S643000, C313S573000, C313S634000

Reexamination Certificate

active

07834533

ABSTRACT:
A T8 fluorescent lamp can comprise a light-transmissive glass envelope, means for providing an electrical discharge to the glass envelope, a phosphor layer within the glass envelope and a discharge-sustaining fill gas inside the glass envelope. The phosphor layer can comprise phosphors of a type for producing a daylight lighting spectrum or of a type for producing a tungsten/halogen lighting spectrum. The fill gas can comprise a mixture of argon and neon. In a particular mode of operation, the T8 lamp can operate at a power of at least 45 watts. In another mode of operation, the T8 fluorescent lamp can operate at a power of approximately 70 watts. A lighting fixture can comprise an array of such T8 fluorescent lamps arranged substantially side-to-side on longitudinal centerlines that are less than one and one-half inches apart. In a particular instance, the fixture can have been retrofitted from having been outfitted to accommodate T12 lamps.

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