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2 pin vs 4 pin bulb

Discussion in 'Electronic Repair' started by don, Jun 3, 2010.

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  1. don

    don Guest

    What are the advantages of a 4pin vs a 2pin bulb..... the manufacturer of my
    task light used a 2 pin bulb but the socket is made to accept a 4 pin......
    Also..... the socket wire connections are of the type Leviton as seen in
    this photo.....

    I am trying to replace the ballast.... does anyone know how to unhook the
    wires from this lamp holder?
  2. shrtrnd


    Jan 15, 2010
    Not familiar with this ballast, can't help you with unhooking the wires.
    From the description in the website you reference, the ballast is capable of a 'two intensity' bulb. A low and high intensity. So the two pins are probably for a single intensity bulb, (which would be what you have installed now). And the four pins would be used for a bulb with a low and high intensity capability. Half of your question answered, anyway. Just be aware, that the LAMP manufacturer, may NOT have wired your lamp, to UTILIZE the 'two intensity' capability of the ballast manufacturer. The manufacturer may have just bought the four-pin sockets in some cost-saving move for his company, and the lamp itself MAY not utilize the 'two-intensity' capability of the ballast.
    Last edited: Jun 3, 2010
  3. don

    don Guest

    Don, that photo is of the ballast, not the socket.

    Some sockets have the pins crimped to the stranded wire then poked
    into the housing. That type is often non-removeable or requires a
    special tool to release the pin.

    Neil S.

    ok thanks.... if you follow the link it would bring you to the pic of the
    socket which was a .pdf form so I didn't know if a direct link could be done
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