I was so pleased with the bright lights on this jacket. However, after 1 use (20 minutes walking my daughter to school), the lights no longer work. I have changed the batteries for new ones, just to make sure it wasn't a battery problem. But they still don't work. To be honest, I simply haven't the time to make the 11-mile-round trip to the post office to post it back and get a refund. So, I'm wearing it anyway, without the lights. I was disappointed though.