Use our C7 & C9 LED Christmas lights to create bold outdoor Christmas light displays. These energy efficient LED light bulbs are beautiful, super bright, versatile, and will shine for 50,000 hours. Incandescent C7 & C9 bulbs can easily be swapped out of your old strands for these energy-saving retrofit LED bulbs. The reasoning is to save you money; incandescent bulbs use significantly more power than LED bulbs and are much more fragile than these sturdy, multifaceted LED bulbs that do not break, chip, or fade.