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Philips Lighting Company SAG100 2008–2009 69
FILAMENT DESIGNATIONS (NOT ACTUAL SIZES)
Filament Designations consist of a letter or letters to indicate how the wire is coiled and an arbitrary number sometimes followed by a letter to indicate the
arrangement of the filament on the supports. Prefix letters include C (coil) — wire is wound into a helical coil or it may be deeply fluted; CC (coiled coil) — wire is
wound into a helical coil and this coiled wire again wound into a helical coil. Some of the more commonly used types of filament arrangements are illustrated.
BASE TYPES (NOT ACTUAL SIZES)
BULB SHAPES (NOT ACTUAL SIZES)
The size and shape of a bulb is designated by a letter or letters followed by a number. The letter indicates the shape of the bulb while the number
indicates the diameter of the bulb in eighths of an inch. For example, “T10” indicates a tubular shaped bulb having a diameter of
10
⁄8 or 1
1
⁄4 inches.
The following illustrations show some of the more popular bulb shapes and sizes.
Halogen Bulb Shapes
Halogená
®
Bulb Shapes
HALOGEN LAMPS
Filament Designations, Base Types and Bulb Shapes
Fluorescent 87–120 High Intensity Discharge 121–148 Solid State Lighting 149–156 Specialty 157–177 Additional Information 178–189