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How can I tell if G24q base is damaged

Discussion in 'LEDs and Optoelectronics' started by Confuzzled, Dec 31, 2020.

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  1. Confuzzled

    Confuzzled

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    0
    Dec 31, 2020
    Hi,
    Sorry folks, but I am a complete electronics novice looking for help.
    So please be kind.
    And sorry if this is the wrong section for posting this question.
    4 pin fluorescent ceiling lamp blew.
    Bought a replacement and it does not work.
    Could the lamp have damaged the G24q base?
    How can I tell which is the culprit - is the new lamp faulty, or the base (fitting)?
    Thanks for any help as I don't want to send the lamp back only to find the light fitting is at fault.
     
  2. Bluejets

    Bluejets

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    Oct 5, 2014
    Show a photo of the fitting so we know what you are referring to.
     
  3. bertus

    bertus Moderator

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    Nov 8, 2019
    Hello,

    There are several types of G24 bases.
    Have a look at this picture:
    g24-lamp-base.gif
    There are 3 different G34q types.

    Bertus
     
  4. Bluejets

    Bluejets

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    Oct 5, 2014
    Possibly took out the ballast.
     
  5. Harald Kapp

    Harald Kapp Moderator Moderator

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    Nov 17, 2011
    So that would be a GQ24q type according to the picture in post #3.
    A fault in the fixture, while not impossible, is unlikely. Check the wiring, the ballast, the contacts of the socket.
     
  6. bertus

    bertus Moderator

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    Nov 8, 2019
    Hello,

    It looks like that the G24q base is used with electronic ballasts only:
    G24q Info.png
    https://blog.1000bulbs.com/home/types-of-sockets

    It could be that the ballast stopped working.

    Did the new lamp go in easy and did it hold in the socket?
    If it did not go in all the way, the dowel may be at the wrong position or you may need a Gx version.
    The dowel position seems to be related to the power of the lamp.
    This is what I found:
    The G24q-1 is 10 or 13 Watt.
    The G24q-2 is 18 Watt.
    The G24q-3 is 26 Watt.
    There even seems to be a G24q-4 wich has two dowels on each side and is used for 42 Watt.
    G24q info.jpeg
    Bertus
     
    davenn likes this.
  7. Bluejets

    Bluejets

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    Oct 5, 2014
    Those fitings are a right pain in the butt to get out so maybe damaged when lamp removed.

    Not so....I have seen commercial fittings with iron core ballast.
     
    Last edited by a moderator: Jan 8, 2021
  8. bertus

    bertus Moderator

    2,060
    777
    Nov 8, 2019
    Hello,

    @Bluejets , I know the sockets are difficult.
    I already had a couple that where so heated by the lamp that they became brown and brittle.
    Pieces broke off when removing the lamp.

    Bertus
     
  9. Bluejets

    Bluejets

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    Oct 5, 2014
    LED replacement solves any shorted ballast problem.......open ballast requires shorting wire fitted.
    Also low heat from LED solves cooked lampholder......still a right pain to get out but can't have everything I guess.
     

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