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| T5 fluorescent lamp ： ウィキペディア英語版 |
Fluorescent-lamp formats
Since their introduction as a commercial product in 1939, many different types of fluorescent lamp have been introduced. Systematic nomenclature identifies mass-market lamps as to overall shape, power rating, length, color, and other electrical and illuminating characteristics.
==Tube designations==
Lamps are typically identified by a code such as FxxTy, where F is for fluorescent, the first number (xx) indicates either the power in watts or length in inches, the T indicates that the shape of the bulb is tubular, and the last number (y) is the diameter in eighths of an inch . Typical diameters are T12 or T38 ( in or 38.1 mm) for residential lamps with magnetic ballasts, T8 or T26 (1 in) for commercial energy-saving lamps with electronic ballasts, and T5 or T16 ( in) for very small lamps, which may even operate from a battery-powered device.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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