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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

Illuminant

Color

Temperature (K)

Color Rendering

Index

Common Name(s)

F1

6430

76

daylight

F2*

4230

64

cool white

F3

3450

57

white

F4

2940

51

warm white

F5

6350

72

daylight

F6

4150

59

lite white

 

II.  Broad-band fluorescent lamps

Illuminant

Color

Temperature (K)

Color Rendering

Index

Common Name(s)

F7*

6500

90

D65

F8

5000

95

D50, Sylvania F40 Design 50 (F40DSGN50)

F9

4150

90

cool white deluxe

 

III.  Three narrow band fluorescent lamps

Illuminant

Color

Temperature (K)

Color Rendering

Index

Common Name(s)

F10

5000

81

TL85, Ultralume 50

F11*

4000

83

TL84, Ultralume 40

F12

3000

83

TL83, Ultralume 30

*  Illuminants F2, F7, and F11 should take priority over others when a few typical illuminants are to be selected.

 

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Last modified: 04/19/04