POPSUGAR Home Holiday Guess What Type of Lights Are on the National Christmas Tree? by Home 12/15/09 0 Shares Like us on Facebook Sign up for our daily newsletter > This year, the National Christmas Tree is lit from tip to bottom with a type of energy-saving light. Can you guess what these lights are? Image Source: Getty Read More Energy EfficiencyEco Living TipsChristmas TreeHolidayGuess Who Holiday Homemade Limoncello Is a Bartender's Best Friend The Easiest Edible Gift: Banana Nut Bread 100+ of the Best DIY Gifts Ever The Dessert You Never Knew Your Crockpot Could Make POPSUGAR, the #1 independent media and technology company for women. Where more than 75 million women go for original, inspirational content that feeds their passions and interests. Get inspired with our daily newsletter Tech Home Vegetarian DIY Love and Sex Food Sign up with By signing up, I agree to the Terms and to receive emails from POPSUGAR.