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 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 40+ Life-Changing Books to Read This Year 13 Brilliant Tech Hacks For Your Next Trip 15 Books to Give Your Friends Going Through a Quarter-Life Crisis 100 Gifts Your Best Friend Will Obsess Over 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 DIY Food Vegetarian Love and Sex Home Sign up with By signing up, I agree to the Terms and to receive emails from POPSUGAR.