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 > Follow us on Pinterest 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 Shake — Don't Bake — a Pumpkin Pie Cocktail 65 Nostalgic Stocking Stuffers For '90s Girls 14 Pitch Perfect Gifts That Are Aca-Mazing 40 Appetizers to Nosh on While the Thanksgiving Turkey Roasts 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 Living Newsletter Personalize Tech Home Food Love and Sex DIY Vegetarian Sign up with facebook or By signing up, I agree to the Terms and to receive emails from POPSUGAR.