I bought 2 boxes of these for my shop just over 1 year ago. They are still working but at about 1/2 the light they were putting out. I have some 4 year old GE lamps that are still very bright. I will not be buying Philips lamps again. I bought them because I thought Philips was a good company and they are US made. I'll pay more next time for GE or Sylvania.