Pre-lit Christmas Tree Lights Very Dim

Category Lights
Pre-lit Christmas trees are a great way to not have the frustrating task of adding lights to your tree. But if the lights become dim over time you may need to do some troubleshooting. The main culprits are the transformer and/or the fuses.


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Our five year old, 10 ft Christmas tree's lights are about half the brightness they were last year. The bottom section is brighter than the rest of the tree, but overall the whole tree is dim. We contacted the company we bought the tree from and they suggested the transformer was going. We replaced the transformer, the bottom part of the tree is now a bit dimmer and the rest of the tree a small bit brighter than with the old transformer, still overall dim. We checked the connections between each section for the wattage and each connection read 25 W as it should be from the 25W transformer. I hope you can suggest a solution to this problem. Thanks.


December 5, 20190 found this helpful
Best Answer

I would exchange the transformer for another one. If it still doesn't work, you have a problem with the bulbs themselves or the fuses.

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November 19, 2017

I have a large 10 year old pre-lit tree it is beautiful except that last year I had replaced lots of lights, this year it is a mess, I am trying to get it perfect again. The issue is I replaced fuses, I am finding the cause of lights that are out, but the more bulbs I replace the dimmer the lights get. Once I get to the last branch in the stand, there is a small very dim orange light left and that is it.


This is taking me hours upon hours and I am not getting it. Am I replacing with the wrong kinds of bulbs, I changed the fuses, what the heck?

Please help!


November 20, 20170 found this helpful
Best Answer

You will need to buy a special replacement bulb kit for this tree. You can find them online at the Tree Classic. These types of tree have or use a different type of replacement bulb than standard tree lights use. That is why you are having a problem. Some of these lights come with a small resister in each light to make them work where standard tree lights don't use this type of resister.

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