I came for the ROHS certification on the lights initially- this is so important to me with children in the house. I ordered another kind of lights initially. It was, unbeknownst to me, a commercial grade of lights for which you have to order your own cord plug-in. However, a customer service representative called me and verified that this was what I meant to do, and then helped me figure out which type of lights would better suit my needs. She even fixed the order over the phone, and found me a sale to order, So I could buy more! Thanks so much, holidayleds. I'm telling everyone I know about how awesome you guys are.