Efficient lightbulbs Recycling Facts | 1 comment If people worldwide switched to energy efficient lightbulbs the world would save US$120 billion annually. Fact source 1 Comment Carl J. Rygg on November 7, 2016 at 2:21 pm how much would it cost to switch? Reply Submit a Comment Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website This site uses Akismet to reduce spam. Learn how your comment data is processed.