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    averysunshine's Avatar
    averysunshine Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Nov 19, 2011, 01:46 PM
    Prelit Christmas Tree
    If I buy a pre-lit tree, will all the lights go out if only one is bad? How will I know which one is bad? How can I replace the bad bulb?
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
    Uber Member
    		  
    #2

    Nov 19, 2011, 03:05 PM
    All prelit trees today have a shunt circuit in the bulb so that if it goes bad, the rest will still work. Sure beats the old series way of wiring and having to run a resistance check to see which one was bad.
    odinn7's Avatar
    odinn7 Posts: 7,691, Reputation: 1547
    Entomology Expert
    		  
    #3

    Nov 19, 2011, 03:07 PM
    Oh man... the old days of having to try to figure out which bulb is bad. Can't say how many strings of lights I simply threw out to avoid the trouble. Anyway, modern lights and pre-lit trees don't go out with a single dead bulb. Just the bad bulb goes out and the rest stay on.
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
    Uber Member
    		  
    #4

    Nov 19, 2011, 05:15 PM
    My dad would pull the lights out and start testing and by the time it was all fixed Christmas was about over.
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