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Convertting fluorescent light from 2 to 1 lamp?

Discussion in 'Electronic Basics' started by DaveC, Apr 19, 2004.

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  1. DaveC

    DaveC Guest

    A standard 2-lamp (40 watt?) fluorescent lamp fixture consists 2 lamps and a
    ballast.

    Is it possible to replace one lamp in such a circuit with a passive component
    such that it will run a single lamp?

    Thanks,
     
  2. Jerry G.

    Jerry G. Guest

    Change the ballast transformer.

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    A standard 2-lamp (40 watt?) fluorescent lamp fixture consists 2 lamps and a
    ballast.

    Is it possible to replace one lamp in such a circuit with a passive
    component
    such that it will run a single lamp?

    Thanks,
     
  3. Harry Muscle

    Harry Muscle Guest

    Some ballasts can run 2 or 1 lamp safely. Check with the manufacturer,
    cause all you might have to do is cap the leads leading to the second bulb
    (cap to 600V min usually).

    Harry
     
  4. bushbadee

    bushbadee Guest

    Depends on a bunch of things.

    You will probly have short life on the bulb.
    If your lamps have filaments then the transformer is designed to provide the
    proper voltage to two sets of filaments.
    If you use just one set, then the voltage will be high and the filaments
    will have a very short life.

    It is possible to load every thing down with resistors, but they will have
    to be large high wattage resistors .
    You best bet is to as some one has noted, get another ballast.
     
  5. DaveC

    DaveC Guest

    These are very old (40 years); mfr no longer in biz. If one lamp dies, the
    other one flickers or goes dark. So some load is necessary in the 2nd lamp
    position, if it is removed.

    Ideas?
     
  6. bushbadee

    bushbadee Guest

    buy a new ballast or fixture.
    They are cheap e nought
     
  7. SQLit

    SQLit Guest

    There use to be phantom lamps made. So you could reduce the light output by
    half.
    I have not seen a phantom lamp in years. I would change the ballast
     
  8. James Sweet

    James Sweet Guest


    There's ways to do it, but it won't save much (any?) power. My advice is to
    pick up one of those Advance F32T8 electronic ballasts from Home Depot and
    install a T8 tube, they have two independant secondaries and can safely run
    one or two lamps. They're only about $15 too.
     
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