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Technical Tips CIE Fluorescent Illuminants
The "Standard" group of fluorescent lamps consists of two semi-broadband emissions of antimony and manganese activations in a calcium halo-phosphate phosphor. This group includes the standard cool white fluorescent (CWF) illuminant in use for many years.
The "Broad-band" group are more or less enhanced in color rendering properties as compared to the "Standard" group, usually using multiple phosphors. Relative spectral power distributions of the "Broad-band" group are flatter and have a wider range in the visible spectrum than the "Standard" group.
The "Three narrow-band" group consist mostly of three narrow-band emissions in red, green and blue wavelength regions. In most cases the narrow-band emissions are caused by ternary compositions of rare-earth phosphors. This group includes the "prime color lamps" such as the Phillips TL83, 84 and 85 and their US counterparts Ultralume 30, 40 and 50
I. Standard fluorescent lamps
II. Broad-band fluorescent lamps
III. Three narrow band fluorescent lamps
* Illuminants F2, F7, and F11 should take priority over others when a few typical illuminants are to be selected. |
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