ANSWERS: 2
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not sure
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Gimmick?! They've been around since 1962!! Here is a list of advantages and disadvantages: https://www.berkeys.com/2016/11/16/advantage-disadvantage-led-lights/ I had some Christmas tree lights that were LED. They seemed brighter than the older ones. But I didn't have them long enough for a bulb to go out so I don't know if it was any less difficult than the older ones to replace.
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