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ANSI C78.1402
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ANSI C78.1402 2004 Edition, January 1, 2004 For Electric Lamps - Dimensions for Projection Lamps - G17q and GX17q Based Four-pin, Prefocus, for Base-down Operation
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Description / Abstract:
This standard establishes the dimensions essential to the
interchangeability of fourpin, prefocus projection lamps for
base-down operation of T10 and T12 bulb sizes. It is not the intent
of this standard to prescribe operating characteristics or details
of design. This standard does not apply to internal condensing
reflector-type lamps not requiring external optical systems.