Bulletin
115
Lighting
Information
|
Bulletin
115 Lighting
Information |
To obtain normal ballast life and maximum efficiency
from a fluorescent lighting installation, fixtures should periodically be
inspected for:
·
Lamps
cycling on and off
·
Heavy
lamp end discoloration
·
Blinking
lamps
·
Dim lamps
·
Slow
starting lamps
·
Inoperative
lamps
The significance and correction of these conditions
may vary with the type of lamp (see sections headed "Slimline" or
"Rapid Start" lamps). However,
there are general rules which apply to all types.
They are:
¨
Lamps
should be replaced when they reach 80% of their rated life.
Your lamp supplier has more specific information available regarding lamp
maintenance procedures.
¨
Lamps
should be cleaned periodically, especially Rapid Start, since an accumulation of
dirt combined with high humidity conditions can make starting the lamps
difficult.
¨
Line
voltage should be checked at the fixture and compared with the ballast rating to
be sure it is within prescribed limits.
¨
Lamps
cycling on and off may be a warning that the ballast is operating at too high a
temperature which causes the automatic resetting thermal protector within the
ballast (Class P or non-Class P) to perform its function.
Troubleshooting
Fixtures with Slimline Lamps
For fixtures using Slimline lamps, this additional
procedure should be followed:
·
Heavy
lamp end discoloration indicates approaching end of life necessitating immediate
lamp replacement.
·
Inoperative
lamps should be replaced by known good lamps.
·
If the
good lamp does not operate: check sockets, wiring, line voltage, polarity and
grounding.
·
When the
above items appear to be correct and the lamps still do not operate properly, it
may be assumed that the ballast is inoperative and should be replaced.
Inoperative Slimline lamps should not be left in a fixture as the ballast will overheat and burn out prematurely.
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