In a little over a month we will reach the 130th anniversary of a significant scientific breakthrough that has affected the lives of everyone reading these words.

Klipsch to Illuminate Audio Industry with New LightSpeaker Energy-saving product uniquely combines brilliant LED lighting and wireless ambient sound ...

Some of these could be replaced with a working bulb, but not all. The other type of circuit light strands use is a parallel circuit. In this setup, each bulb is on its own circuit to the power source.