Ah, a classic question for the holiday season! The number of lights on a 6 foot Christmas tree can vary depending on personal preference and the overall aesthetic you're going for. As a general guideline, you could consider using around 1,000 to 1,200 lights. However, if you want a more twinkling and sparkling effect, you could use more than that, or even less if you prefer a more minimalist look. It's all about finding the right balance to create the perfect Christmas tree for your home!