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Special Colours
These were designed to suit particular lighting needs and would not normally be
used as general lighting lamps.
Standard
Warm White 29
White 35
Cool White 33
Daylight 54
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Special
Deluxe Natural 36
Natural 25
Kolor-rite 38
Northlight 55
Artificial Daylight AD
Chroma 50 C50
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Initial Lumens
The light output claim for fluorescent lamps is described as initial lumens and is
measured after 100 hours burning, which allows new lamps to stabilise. Light output is measured at
25 degrees Celsius in accordance with IEC 81 and 901. The new long T5 lamps are measured at 35
degrees Celsius.
Lamp Life
The life of a fluorescent lamp varies with:
-
The number of times the lamp is
started.
-
How the lamp is started.
-
How it is operated after
starting.
The longer the time of operation
per start, the longer the lamp life. Standard rated average life assumes 3 hours operation per
start.
Fluorescent Order Codes
Fluorescent lamp codes are simpler than incandescent codes. The first digit is
always "F", standing for "fluorescent"".
Figure 2.19. First component of fluorescent order code.
The second component defines the lamp wattage for European lamps. USA lamps
generally refer to the length in inches as the second component.
Figure 2.20. Second component of fluorescent order code.
The last component for most fluorescent lamps defines the colour.
Figure 2.21. Last component of fluorescent order code.
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