LED replaceable multi-faceted bulbs can be placed directly into traditional C7 or C9 light strings. LED lighting is energy efficient, far exceeding florescent and incandescent lighting. LED are long lasting and virtually maintenance free! LED lights consume 90% less electricity than incandescent lights. Because of the ability to plug in a large number of strands end-to-end using only one outlet, our LED lights allow for greater flexibility in lighting than ever before! Our LED lights have sturdy plastic lenses that are nearly indestructible, so you don't have to worry about breaking glass bulbs or vandalism. LED lights operate much cooler than traditional lights, emitting virtually no heat. No transformers are needed.