Please Note: Products are designed and rated for use in the United States using 120 volt current. With or without a transformer, this product is not recommended for use outside the US.Light Set is made of bamboo, lights are replaceable and string measures 11" in length. Has 10 Bamboo Lights. UL Listed White Power Cord. Can be used indoors or out. Includes 4 extra bulbs. Lights burn steady. Please note that the strand will not stay lit if one bulb burns out.