We ordered 11 music stand lights for our trombone. The delivery took place immediately. When testing the switch on a lamp was broken. After an email to the sales agency Marc Wehrmann this was easily and replaced free of charge within 2 days. Now that is a great service, thank you. The lamps meet our expectations and have been used over Christmas by the trombone. The price - performance ratio is absolutely in order. We are happy to buy again in this trade agency. T. Röcker (trombone choir conductor)