Have several runs of these strands of lights and system. It's an AC 120v system, stepped down with a transformer to 12 volts. All stainless materials. Cost to replace these systems is $12 per foot just for the low voltage cable, plus $40 each for the anchors, $180 for EACH light, $260 each for the transformers, plus $18 per LED bulb. Or about $1200 per string when new. Just $250 per used string here and now! The strands are about 20 feet in length, can be custom fit for each application. Can assist with installation consulting.