Instruct: Classify Amazon reviews into positive or negative sentiment
Query: expensive for how long they last...

I bought two sets of this for two cars. One bulb out of each set burned out within 12 month and 15 month. Sylvania rep stated that they are only expected to last 12 month. Also "OSRAM SYLVANIA, Inc. does not have an across-the-board warranty for our products." I would goto another brand.