I think it depends on the quality of pre-lit tree you get. I have three GE Fresh-cut trees made by a company called Santa’s Best pre-lit with GE lights the oldest is six years old and still doing fine.
'I will live in the Past, the Present, and the Future!' Scrooge repeated, as he scrambled out of bed. 'The Spirits of all Three shall strive within me. Oh, Jacob Marley! Heaven, and the Christmas Time be praised for this! I say it on my knees, old Jacob, on my knees!' (Charles Dickens A Christmas Carol)